???global.info.a_carregar???
Helder Manuel Paiva Rebelo Cerejo Crespo. Concluiu o(a) Doutoramento em Física em 2006 pelo(a) Instituto Superior Técnico Departamento de Física, Licenciatura em Engenharia Física Tecnológica em 1996 pelo(a) Instituto Superior Técnico Departamento de Física e Postgraduate Certificate em Postgraduate Diploma in Strategy and Innovation em 2020/07/14 pelo(a) University of Oxford Said Business School. É Academic visitor no(a) Imperial College London Department of Physics, Professor Auxiliar no(a) Universidade do Porto Faculdade de Ciências e Professor Visitante no(a) Imperial College London. Publicou 51 artigos em revistas especializadas. Possui 7 capítulo(s) de livros e 2 livro(s). Orientou 5 tese(s) de doutoramento e coorientou 1. Orientou 6 dissertação(ões) de mestrado. Recebeu 4 prémio(s) e/ou homenagens. Atua na(s) área(s) de Ciências Exatas com ênfase em Física. No seu currículo Ciência Vitae os termos mais frequentes na contextualização da produção científica, tecnológica e artístico-cultural são: Instrumentation; measurement; and metrology; Phase measurement; Ultrafast optics; Ultrafast phenomena; Physics; holographic portraits; artistic concepts; expressive techniques; multicolour holography; Células Solares; Magneto-plasmónica; Ressonância de plasmões de superfície; Materiais nanoestruturados; Efeitos de Dimensionalidade; Ligas intermetalicas de Heusler; Materiais Heli-magnéticos; Materiais Magnetocaloricos; Ótica não Linear; Materiais em camadas; Excitões ; Método do Kernel Polinomial; Grafeno; Plasmónica; Optoelectrónica de IV médio e longínquo; Biossensor; Física de atosegundos; Impulsos ultra-curtos no ultra-violeta extremo; Dinâmica magnética e electrónica ultra-rápida; Nanomateriais magnéticos e sistemas de electrões f; fotónica ultra-rápida em grafeno; geração de terceiro harmónico de banda larga; caracterização de impulsos ultra-curtos; conversão de frequência de banda larga; Dinâmica ultra-rápida de elementos magnéticos; Fonte compacta e coerente de harmónicos elevados ; Nanopartículas magnéticas; Espectroscopia XUV de femtosegundos; Dinâmica da magnetização; Nanomagnetismo; Transferência de momento angular de spin; Espectroscopia femtosegundo; Óptica não-linear ultra-rápida; Lasers ultra-curtos; Impulsos com um único ciclo óptico; Estabilização da fase absoluta; espectroscopia não-linear ultra-rápida; moléculas dador-aceitadores; difusão hiperrayleigh; absorção de dois fotões; Ultrafast lasers; Ultrafast Spectroscopy; .
Read full resume ↓
Identification

Personal identification

Full name
Helder Manuel Paiva Rebelo Cerejo Crespo

Citation names

  • Crespo, Helder
  • Crespo, Helder M
  • Crespo, HM

Author identifiers

Ciência ID
1018-3ADB-A972
ORCID iD
0000-0002-5716-7181
Google Scholar ID
https://scholar.google.pt/citations?user=RhbCBhIAAAAJ&hl=en
Researcher Id
K-2452-2012
Scopus Author Id
6602742911

Knowledge fields

  • Exact Sciences - Physical Sciences

Languages

Language Speaking Reading Writing Listening Peer-review
English Advanced (C1) Advanced (C1) Advanced (C1) Advanced (C1)
French Advanced (C1) Advanced (C1) Intermediate (B1) Advanced (C1)
Spanish; Castilian Advanced (C1) Advanced (C1) Advanced (C1) Advanced (C1)
Portuguese (Mother tongue)
Education
Degree Classification
2019/03/01 - 2020/07/14
Concluded
 Postgraduate Diploma in Strategy and Innovation (Postgraduate Certificate)
Major in Strategy and Innovation
University of Oxford Said Business School, United Kingdom
"Maintaining competitive advantage in the high-end scientific market: ambidexterity and open innovation in a deep tech photonics SME" (THESIS/DISSERTATION)
 Pass
2006
Concluded
 Física (Doutoramento)
Major in Ultrafast nonlinear optics and laser science
Instituto Superior Técnico Departamento de Física, Portugal
"Cascaded Four-wave Mixing Processes and Laser Pulse Generation in Ultrafast Nonlinear Optics" (THESIS/DISSERTATION)
1996
Concluded
 Engenharia Física Tecnológica (Licenciatura)
Major in Não Aplicável
Instituto Superior Técnico Departamento de Física, Portugal
Affiliation

Science

Category
Host institution 		Employer
2024/03/04 - Current Principal Investigator (Research) Science & Technology Facilities Council Central Laser Facility, United Kingdom
Science & Technology Facilities Council Central Laser Facility, United Kingdom

Teaching in Higher Education

Category
Host institution 		Employer
2021/05 - Current Associate Professor (University Teacher) Universidade do Porto Faculdade de Ciências, Portugal
Universidade do Porto Departamento de Física e Astronomia, Portugal
2021/03/09 - 2024/10/01 Visiting Professor (University Teacher) Imperial College London, United Kingdom
Imperial College London Department of Physics, United Kingdom
2006 - 2021/06 Assistant Professor (University Teacher) Universidade do Porto Faculdade de Ciências, Portugal
2001/09/01 - 2006/08/31 Invited Assistant Professor (University Teacher) Universidade do Porto Faculdade de Ciências, Portugal
1994/09/01 - 1998/12/31 Tutor (University Teacher) Instituto Superior Técnico Departamento de Física, Portugal

Others

Category
Host institution 		Employer
2015/04/01 - Current Academic visitor Imperial College London Department of Physics, United Kingdom
2016/10/01 - 2017/02/01 Distinguished Researcher (competitive international call) Universidad de Salamanca, Spain
2011/03/01 - 2011/08/31 Visiting Scientist Universidad Complutense de Madrid Departamento de Óptica, Spain
2008/07/01 - 2008/09/30 Visiting Scientist Massachusetts Institute of Technology, United States
2007/02/01 - 2008/03/31 Visiting Scientist Massachusetts Institute of Technology, United States
1997/04/01 - 2006/07/31 Visiting researcher (several 1-3 month stays over the stated period) Laboratoire d'Optique Appliquée, France
Projects

Grant

Designation Funders
2017/09 - 2020/08 UltraGraf - Harnessing third-harmonic generation in graphene-coated optics - new devices for ultrafast pulse measurement and frequency upconversion
project4340
 EU Horizon 2020 / FCT / MINECO (Spain)
2012/02 - 2015/11 High-resolution ultrafast probing of element-specific demagnetization dynamics of magnetic elements and nanoparticles using a fully coherent tabletop soft X-ray laser-based source
grant.Provided by PTCRIS: 122511
 Fundação para a Ciência e a Tecnologia
2015/04/01 - 2015/08/31 Intense single-cycle laser pulses for high-harmonic generation and attosecond spectroscopy
SFRH/BSAB/105974/2015
Imperial College London, United Kingdom
 Fundação para a Ciência e a Tecnologia
Concluded
2010/12 - 2014/12 Generation and measurement of single-cycle ultrafast optical pulses
grant.Provided by PTCRIS: 115102
 Fundação para a Ciência e a Tecnologia
2011/01 - 2014/06 Control and manipulation of magnetisation dynamics in nanosystems
grant.Provided by PTCRIS: 115561
 Fundação para a Ciência e a Tecnologia
2010/04 - 2014/03 Nonlinear spectroscopy of push-pull organic molecules
grant.Provided by PTCRIS: 105597
 Fundação para a Ciência e a Tecnologia
2011/03/01 - 2011/08/31 DESENVOLVIMENTO DE UM OSCILADOR LASER DE TITÂNIO: SAFIRA COM ESPECTRO DE UMA OITAVA E ESTABILIZADO EM FASE ABSOLUTA
SFRH/BSAB/1100/2010
Universidad Complutense de Madrid, Spain

Universidade do Porto, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2009/01 - 2010/12 New methods for the generation of phase-stabilized laser pulses in the ultraviolet and extreme ultraviolet ranges
E-58/09
 CRUP - Conselho de Reitores das Universidades Portuguesas
2006/01 - 2008/12 Advanced Laboratory of Nonlinear and Quantum Optics
REEQ/547/FIS/2005
 Universidade do Algarve Faculdade de Ciências e Tecnologia
2007/02/01 - 2008/03/31 PUSHING THE LIMITS OF FEW-CYCLE PULSE GENERATION FROM AN ULTRAFAST LASER OSCILLATOR: TOWARD HIGH-QUALITY SINGLE-CYCLE PULSES
SFRH/BPD/27127/2006
 Fundação para a Ciência e a Tecnologia
Concluded
2004/02 - 2007/01 Extreme regimes and discontinuities in ultrafast nonlinear optics
POCTI/FAT/48709/2002
 Universidade do Algarve Faculdade de Ciências e Tecnologia
1997/04/01 - 2001/03/31 ACELERAÇÃO DE FOTÕES EM MEIOS DIELÉCTRICOS
PRAXIS XXI/BD/11576/97
 Fundação para a Ciência e a Tecnologia
Concluded

Contract

Designation Funders
2023/03/01 - 2026/02/28 Non-linear phononics: Manipulating the hidden quantum phases and dynamical multiferroicity
2022.03564.PTDC
10.54499/2022.03564.PTDC
Universidade do Porto Faculdade de Ciências, Portugal

International Iberian Nanotechnology Laboratory, Portugal

Universidade do Minho, Portugal
Fundação para a Ciência e a Tecnologia
Ongoing
2021/01/01 - 2025/12/31 Laboratory of Physics for Materials and Emergent Technologies
LA/P/0095/2020
10.54499/LA/P/0095/2020
Universidade do Porto Instituto de Física dos Materiais-Instituto de Nanociência e Nanotecnologia, Portugal

Universidade do Porto Faculdade de Ciências, Portugal

Centro de Física das Universidades do Minho e do Porto, Portugal

Associação do Instituto Superior Técnico para a Investigação e Desenvolvimento, Portugal

Universidade do Minho, Portugal

Universidade de Lisboa Centro de Fisíca e Engenharia de Materiais Avançados, Portugal
Fundação para a Ciência e a Tecnologia
Ongoing
2018/07/26 - 2022/07/25 Dimensionality effects in the physical properties of Heusler and magnetostrictive intermetallic materials: From 1- to 3-D architectures
PTDC/FIS-MAC/31302/2017
Universidade do Porto, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2018/07/15 - 2022/06/30 Non Linear Optical Properties of Layered Materials
PTDC/FIS-MAC/28887/2017
Universidade do Porto, Portugal

Universidade do Minho, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2018/07/01 - 2022/06/30 Isolated attosecond pulses on a tabletop: measuring and controlling extreme ultrafast dynamics in matter
PTDC/FIS-OTI/32213/2017
Universidade do Porto, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2018/07/01 - 2022/06/30 Mid- and far-infrared plasmonic biosensing with graphene
PTDC/FIS-MAC/28114/2017
Universidade do Minho, Portugal

International Iberian Nanotechnology Laboratory, Portugal

Universidade do Porto, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2017/09/01 - 2021/08/31 Harnessing third-harmonic generation in graphene-coated optics - new devices for ultrafast pulse measurement and frequency upconversion
M-ERA-NET2/0002/2016
Universidade do Porto Faculdade de Ciências, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2018/07/26 - 2021/07/25 Efeitos de dimensionalidade nas propriedades físicas de materiais intermetalicos magnetoestrictivos e de tipo Heusler: Arquiteturas de 1 a 3 dimensões
PTDC/FIS-MAC/31302/2017
Universidade do Porto, Portugal
 Fundação para a Ciência e a Tecnologia
Ongoing
2018/07/15 - 2021/07/14 Propriedades óticas não lineares de materiais em camadas
PTDC/FIS-MAC/28887/2017
Universidade do Porto, Portugal

Universidade do Minho, Portugal
Fundação para a Ciência e a Tecnologia
Ongoing
2018/07/01 - 2021/06/30 Biodetecção plasmónica no infra-vermelho médio e longínquo usando grafeno
PTDC/FIS-MAC/28114/2017
Universidade do Minho, Portugal

International Iberian Nanotechnology Laboratory, Portugal

Universidade do Porto, Portugal
Fundação para a Ciência e a Tecnologia
Ongoing
2018/07/01 - 2021/06/30 Impulsos isolados de atosegundos produzidos por fonte compacta: medida e controlo de processos ultra-rápidos extremos na matéria
PTDC/FIS-OTI/32213/2017
Universidade do Porto, Portugal
 Fundação para a Ciência e a Tecnologia
Ongoing
2018/07 - 2020/12 Single-shot dispersion-scan device for the characterization of ultrashort laser pulses
789992 - SISCAN
 European Research Council (ERC)
2017/09/01 - 2020/08/31 Geração de terceiro-harmónico em elementos óticos revestidos com grafeno – novos dispositivos para a medição de impulsos ultracurtos e para a conversão de frequência
M-ERA-NET2/0002/2016
Universidade do Porto Faculdade de Ciências, Portugal
 Fundação para a Ciência e a Tecnologia
Ongoing
2018/09/01 - 2020/02/29 Uma nova estratégia de baixo custo para células solares baseadas em nanoestruturas magnetoplasmónicas
MIT-EXPL/IRA/0012/2017
Universidade do Porto Faculdade de Ciências, Portugal

INESC Microsistemas e Nanotecnologias, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2018/09/01 - 2020/02/29 New low-cost approach for solar-cells based on magnetoplasmonic nanostructures
MIT-EXPL/IRA/0012/2017
Universidade do Porto Instituto de Física dos Materiais-Instituto de Nanociência e Nanotecnologia, Portugal

Universidade do Porto Faculdade de Ciências, Portugal

Massachusetts Institute of Technology, United States

INESC Microsistemas e Nanotecnologias, Portugal

Universidad del País Vasco, Spain
Fundação para a Ciência e a Tecnologia
Concluded
2019/01/01 - 2019/12/31 Institute of Nanoscience and Nanotechnology
UID/NAN/50024/2019
INESC Microsistemas e Nanotecnologias, Portugal

Associação do Instituto Superior Técnico para a Investigação e Desenvolvimento, Portugal

Universidade do Porto Faculdade de Ciências, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2012/02/28 - 2015/11/27 Observação da dinâmica de desmagnetização ultra-rápida de elementos e nanopartículas magnéticas através de fonte compacta e espacio-temporalmente coerente de raios-X produzidos por laser
PTDC/FIS/122511/2010
Universidade do Porto Faculdade de Ciências, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2012/02/28 - 2015/11/27 High-resolution ultrafast probing of element-specific demagnetization dynamics of magnetic elements and nanoparticles using a fully coherent tabletop soft X-ray laser-based source
PTDC/FIS/122511/2010
Universidade do Porto Instituto de Física dos Materiais-Instituto de Nanociência e Nanotecnologia, Portugal

Universidade do Porto Faculdade de Ciências, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2014/05 - 2015/04 Measurement and Control of Light Fields for Application in Science and Technology
632239-CLIAS
 European Research Council (ERC)
2010/12/23 - 2014/12/06 Geração e caracterização de impulsos luminosos ultra-curtos com apenas um ciclo óptico de duração
PTDC/FIS/115102/2009
Universidade do Porto Faculdade de Ciências, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2010/12/23 - 2014/12/06 Generation and measurement of single-cycle ultrafast optical pulses
PTDC/FIS/115102/2009
Universidade do Porto Instituto de Física dos Materiais-Instituto de Nanociência e Nanotecnologia, Portugal

Universidade do Porto Faculdade de Ciências, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2011/01/01 - 2014/06/30 Controle e manipulação da dinâmica magnética em sistemas nanométricas
PTDC/FIS/115561/2009
Universidade do Porto Faculdade de Ciências, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2011/01/01 - 2014/06/30 Control and manipulation of magnetisation dynamics in nanosystems
PTDC/FIS/115561/2009
Universidade do Porto Instituto de Física dos Materiais-Instituto de Nanociência e Nanotecnologia, Portugal

Universidade do Porto Faculdade de Ciências, Portugal

Radboud Universiteit Institute for Molecules and Materials, Netherlands
Fundação para a Ciência e a Tecnologia
Concluded
2010/04/01 - 2014/03/31 Espectroscópia não-linear de compostos orgânicos dador-aceitador
PTDC/CTM/105597/2008
Universidade do Minho Centro de Física, Portugal

Universidade do Minho, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2010/04/01 - 2014/03/31 Nonlinear spectroscopy of push-pull organic molecules
PTDC/CTM/105597/2008
Centro de Física das Universidades do Minho e do Porto, Portugal

Universidade do Minho, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2011/01/01 - 2012/12/31 Strategic Project - LA 24 - 2011-2012
PEst-OE/CTM/LA0024/2011
INESC Microsistemas e Nanotecnologias, Portugal

Universidade de Lisboa Instituto Superior Técnico, Portugal

Associação do Instituto Superior Técnico para a Investigação e Desenvolvimento, Portugal

Universidade do Porto, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
Outputs

Publications

Book
  1. Crespo, H.; Tognetti, M.V.; Cataluna, M.A.; Mendonça, J.T.; Dos Santos, A.. Generation of ultrasmooth broadband spectra by gain-assisted self-phase modulation in a ti:Sapphire laser. 2007.
    10.1007/978-0-387-49119-6_37
  2. Dias, F. M.; Tatarova, E.; Ricard, A.; Crespo, H.; Ferreira, C. M.. Experimental study of a hydrogen discharge driven by a propagating wave. 1999.
Book chapter
  1. Azevedo, Isabel; Richardson, Martin; Sandford-Richardson, Elizabeth; Bernardo, Luis Miguel; Crespo, Helder. "The place for performance in the digital holographic space". edited by Bjelkhagen, H. I.; Bove, V. M.. 2014.
    10.1117/12.2036693
  2. Goncalves, C. S.; Silva, Ana S.; Crespo, Helder; Schmool, D. S.. "Dynamic demagnetization in magnetic thin films using a new pump-probe system in the 6 femtosecond range". edited by Costa, Mfpcm. 2013.
    87854n10.1117/12.2026215
  3. Canhota, Miguel; Crespo, Helder; Weigand, Rosa. "Four-wave-mixing assisted pulse shaping of femtosecond UV pulses". edited by Costa, Mfpcm. 2013.
    87854i10.1117/12.2026192
  4. Mendonca, J. T.; Crespo, H.; Amorim, A. A.; Bernardo, L. M.. "Photon kinetic description of nonlinear cross-phase modulation". edited by Costa, Mfpcm. 2013.
    10.1117/12.2026316
  5. Crespo, Helder;; Weig, Rosa. "Ultrafast Phenomena XVI: Proceedings of the 16th International Conference, Palazzo dei Congressi Stresa, Italy, June 9--13, 2008". edited by Corkum, Paul;; Silvestri, Sandro;; Nelson, A. Keith;; Riedle, Eberhard;; Schoenlein, W. Robert, 795-797. Springer Berlin Heidelberg, 2009.
    10.1007/978-3-540-95946-5_258
  6. {Sander. "Modeling of Octave-Spanning Sub-Two-Cycle Titanium:Sapphire Lasers: Simulation and Experiment". 2009.
    10.1007/978-3-540-95946-5_251
  7. {Mendon{\c c. "Nonlinear Phase-Locking of Parametric Optical Processes: the Sliding Resonance Effect". edited by {Krausz. 2004.
    10.1007/978-0-387-34756-1_48
Conference paper
  1. C Guo; M Miranda; A K Raab; A L Viotti; P T Guerreiro; R Romero; Helder M. Crespo; A L'Huillier; C L Arnold. "Single-Shot, High-Repetition Rate Carrier-Envelope-Phase Detection of Ultrashort Laser Pulses". 2024.
  2. T dos Santos Gomes; B Alonso; Helder M. Crespo; M A Cataluna. "Quantification of pulse train instabilities in mode-locked quantum-dot laser diodes". 2024.
  3. C Guo; M Miranda; A K Raab; A L Viotti; P T Guerreiro; R Romero; Helder M. Crespo; A L'Huillier; C L Arnold. "Single-Shot, High-Repetition Rate Carrier-Envelope-Phase Detection of Ultrashort Laser Pulses". 2024.
  4. Christian Maibohm; Hugo Sebastião; João Martins; Maria Leonor Ribeiro; Miguel Miranda; Paulo Tiago Guerreiro; Rosa Romero; Helder M. Crespo; Jana Berit Nieder. "Few-cycle ultra-broadband beam scanning microscope prototype". 2023.
    10.1109/cleo/europe-eqec57999.2023.10232561
  5. Maria Leonor Ribeiro; Christian Maibohm; Tiago Magalhaes; Miguel Miranda; Vitor Amorim; Paulo T Guerreiro; Rosa Romero; Helder M. Crespo; Jana B Nieder. "Metabolic Imaging of 2D and 3D Live Cell Models Using a Beam-Scanning SyncRGB-FLIM Microscope". 2023.
    10.1109/cleo/europe-eqec57999.2023.10231875
  6. T dos Santos Gomes; Helder M. Crespo; M A Cataluna. "Characterization and compression of ultrashort pulses from mode-locked laser diodes using dispersion-scan". 2023.
    10.1364/CLEO_AT.2023.STh3Q.3
  7. M Maimaris; A J Pettipher; M Azzouzi; D J Walke; X Zheng; A Gorodetsky; Yifan Dong; et al. "Sub-10fs Photocurrent and Photoluminescence Action Spectroscopies of Organic Optoelectronic Devices Reveals Ultrafast Formation of Bound Excitonic States". 2022.
  8. Christian Maibohm; Rodrigo Ferreira; Oscar F Silvestre; Rosa Romero; Helder M. Crespo; Jana B Nieder. "Ultra-broadband few-cycle laser pulses for advanced multi-color FLIM- microscopy". 2021.
    10.1109/cleo/europe-eqec52157.2021.9542513
  9. Tiago Gomes; Miguel Canhota; Helder M. Crespo. "Temporal characterization of broadband, low-energy few-cycle pulses using surface third-harmonic generation dispersion-scan". 2021.
    10.1109/cleo/europe-eqec52157.2021.9541910
  10. Azahara Almagro-Ruiz; Salvador Torres-Peiró; Héctor Muñoz-Marco; Romain Dauliat; Raphael Jamier; Rosa Romero; Paulo T Guerreiro; et al. "Few-cycle all-fiber temporally coherent supercontinuum sources". 2021.
    10.1117/12.2577641
  11. C Maibohm; R Ferreira; O F Silvestre; R Romero; Helder M. Crespo; J B Nieder. "Ultra-broadband few-cycle laser pulses for advanced multi-color FLIM-microscopy". 2021.
  12. T Gomes; M Canhota; Helder M. Crespo. "Temporal characterization of broadband, low-energy few-cycle pulses using surface third-harmonic generation dispersion-scan". 2021.
  13. C Maibohm; R Ferreira; O F Silvestre; R Romero; Helder M. Crespo; J B Nieder. "Ultra-broadband few-cycle laser pulses for simultaneous multi-color fluorescence microscopy applications via the SyncRGB-FLIM method". 2021.
  14. Maibohm, C; Ferreira, R; Silvestre, OF; Romero, R; Crespo, H; Nieder, JB. "Ultra broadband few cycle laser pulses for simultaneous multi-color fluorescence microscopy applications via the SyncRGB-FLIM method". 2021.
    10.1117/12.2615698
  15. Miranda, M; Pettipher, A; Canhota, M; Romero, R; Crespo, H; Tisch, J. "Simultaneous Measurement of Two Femtosecond Pulses and Interpulse Delay for Two-colour Pump-probe Experiments". 2020.
    10.1364/up.2020.tu4b.14
  16. Benjamín Alonso; Salvador Torres-Peiró; Rosa Romero; Paulo T Guerreiro; Azahara Almagro-Ruiz; Héctor Muñoz-Marco; Pere Pérez-Millán; Helder M. Crespo. "Detecting and quantifying pulse train instabilities with self-calibrating d-scan". 2020.
    10.1364/fio.2020.fth1b.3
  17. Helder M. Crespo; Tobias Witting; Miguel Canhota; Miguel Miranda; John W G Tisch. "Direct on-target temporal measurement of high-intensity laser pulses during laser-matter interactions". 2020.
    10.1364/fio.2020.fm4c.2
  18. B Alonso; S Torres-Peiró; R Romero; P T Guerreiro; H Muñoz-Marco; P Pérez-Millán; Helder M. Crespo. "Evaluation of the coherent artifact in ultrashort laser pulses using d-scan and its application to broadband fiber lasers". 2019.
  19. M Canhota; R Weigand; Helder M. Crespo. "Dual self-diffraction dispersion-scan and its application to the simultaneous measurement of two ultrashort ultraviolet pulses produced by a spatially inhomogeneous multiplate continuum". 2019.
  20. T Gomes; M Canhota; A Carvalho; B Kulyk; M Miranda; B Jarrais; A J Fernandes; et al. "Broadband few-cycle pulse characterization by third-harmonic dispersion-scan in multilayer and optically improved functionalized graphene coatings". 2019.
  21. A S Silva; S P Sá; S Bunyayev; G Kakazei; M Canhota; M Miranda; C Garcia; et al. "Ultrafast Magnetization Dynamics of CoFeB-based multilayer thin films with perpendicular anisotropy". 2019.
  22. P T Guerreiro; M Miranda; S Torres-Peiró; H Muñoz-Marco; R Romero; P Pérez-Millán; Helder M. Crespo. "Dispersion scan technique addressing NIR wavelengths and longer pulse durations of ultrafast fiber laser systems". 2019.
  23. Tajalli, A.; Ouille, M.; Vernier, A.; Böhle, F.; Escoto, E.; Kleinert, S.; Romero, R.; et al. "Studying the role of nonlinear medium thickness in the characterization of 1.5-cycle pulses using XPW dispersion scan". 2019.
    10.1109/CLEOE-EQEC.2019.8872833
  24. Chibaca, J.C.; Crespo, H.. "Development and application of laser hologram production techniques for the teaching of physics and the public awareness of science". 2019.
    10.1117/12.2531266
  25. Canhota, M.; Weigand, R.; Crespo, H.. "Dual self-diffraction dispersion-scan and its application to the simultaneous measurement of two ultrashort ultraviolet pulses produced by a spatially inhomogeneous multiplate continuum". 2019.
    10.1109/CLEOE-EQEC.2019.8871532
  26. Alonso, B.; Torres-Peiró, S.; Romero, R.; Guerreiro, P.T.; Muñoz-Marco, H.; Pérez-Millán, P.; Crespo, H.; Pérez-Millan, P.. "Evaluation of the coherent artifact in ultrashort laser pulses using d-scan and its application to broadband fiber lasers". 2019.
    10.1109/cleoe-eqec.2019.8872802
  27. Crespo, H; Canhota, M; Witting, T; Tisch, J. "Direct measurement of intense sub-4-fs pulses in a gas target by 3rd-harmonic dispersion-scan". 2019.
    10.1051/epjconf/201920501026
  28. Ferreira, R.; Maibohm, C.; Silvestre, O.F.; Romero, R.; Crespo, H.; Nieder, J.B.. "Few-cycle laser for the in vitro study of cellular bioenergetics during therapeutic treatment with the anticancer drug Doxorubicin in its free and liposomal nanocarrier form". 2019.
    10.1109/cleoe-eqec.2019.8871603
  29. Gomes T.; Canhota M.; Carvalho A.; Kulyk B.; Miranda M.; Jarrais B.; Fernandes A.J.; et al. "Broadband few-cycle pulse characterization by third-harmonic dispersion-scan in multilayer and optically improved functionalized graphene coatings". 2019.
  30. Guerreiro P.T.; Miranda M.; Torres-Peiró S.; Muñoz-Marco H.; Romero R.; Pérez-Millán P.; Crespo H.. "Dispersion scan technique addressing NIR wavelengths and longer pulse durations of ultrafast fiber laser systems". 2019.
  31. Canhota, M; Weigand, R; Crespo, H. "Dual Self-Diffraction Dispersion-scan for Measuring Spatially Inhomogeneous Ultrashort Pulses". 2019.
    10.1051/epjconf/201920501025
  32. Crespo, HM. "Controlling light to the extreme: new results and applications of the dispersion-scan technique". 2018.
    10.23919/ursi-at-rasc.2018.8471661
  33. Silva, F.; Romero, R.; Miranda, M.; Guerreiro, P.; Canhota, M.; Koop, H.; Pervak, V.; Sola, I.J.; Crespo, H.. "Generation and in-situ measurement of the full electric field of near-single-cycle light pulses by CEP dispersion-scan". 2018.
  34. Tajalli, A.; Ouille´, M.; Vernier, A.; Bo¨hle, F.; Escoto, E.; Csontos, J.; Romero, R.; et al. "XPW and SHG d-scan characterization of sub-1.5-cycle pulses". 2018.
    10.1364/HILAS.2018.HW3D.2
  35. F Silva; Í J Sola; Helder M. Crespo; R Romero; M Miranda; C L Arnold; A L'Huillier; J Trull; C Cojocaru. "Monolithic single-shot dispersion-scan: A new tool for real-time measurement and optimization of femtosecond pulses". 2017.
  36. M Canhota; F Silva; R Weigand; Helder M. Crespo. "Self-diffraction dispersion-scan and its application to the measurement of over octave-spanning pulses in the single-cycle regime". 2017.
  37. San Roman, J; Conejero Jarque, EC; Silva, F; Romero, R; Holgado, W; Gonzalez Galicia, MA; Sola, IJ; Crespo, H. "Intuitive identification of optimal few-to single-cycle pulse post- compression dynamics in hollow-core fibers using dispersion-scan". 2017.
  38. Canhota, M; Silva, F; Weigland, R; Crespo, H. "Self-diffraction dispersion-scan and its application to the measurement of over octave-spanning pulses in the single-cycle regime". 2017.
  39. Boehle, F; Vernier, A; Kretschmar, M; Jullien, A; Kovacs, M; Romero, RM; Crespo, HM; et al. "TW-class hollow-fiber compressor with tunable pulse duration". 2017.
    10.1117/12.2265679
  40. Canhota, M; Weigand, R; Crespo, H; Canhota, M.; Weigand, R.; Crespo, H.. "Dispersion-scan Measurements of the Multiplate Continuum Process". 2017.
    10.5220/0006167802690272
  41. Alonso, B; Sola, IJ; Holgado, W; Crespo, H. "Self-calibrating d-scan: a versatile technique for measuring ultrashort laser pulses using an arbitrary pulse compressor". 2017.
    10.1038/s41598-018-21701-6
  42. Silva, F; Sola, IJ; Crespo, H; Romero, R; Miranda, M; Arnold, CL; L'Huillier, A; Trull, J; Cojocaru, C. "Monolithic single-shot dispersion-scan: a new tool for real-time measurement and optimization of femtosecond pulses". 2017.
  43. Canhota, M; Weigand, R; Crespo, H. "Dispersion-scan measurements of few-cycle pulses compressed with the multiplate continuum process". 2017.
    10.1109/cleoe-eqec.2017.8086743
  44. Azevedo, I.; Sandford-Richardson, E.; Richardson, M.; Bernardo, L.M.; Crespo, H.. "Silent images in dialogue". 2016.
    10.1117/12.2212391
  45. D Fabris; W Holgado; F Silva; T Witting; J W G Tisch; Helder M. Crespo. "Ultrashort pulse characterisation with the d-scan technique: A single-shot implementation in the few- to single-cycle regime". 2015.
  46. C S Gonçalves; A S Silva; D Navas; M Miranda; F Silva; Helder M. Crespo; D S Schmool. "Ultrafast demagnetisation and precessional dynamics in gdfeco thin films using a new pump-probe system in the sub-8 femtosecond range". 2015.
  47. W Holgado; C Hernández-García; B Alonso; M Miranda; F Silva; L Plaja; Helder M. Crespo; I J Sola. "Generation of XUV supercontinua through control of attosecond pulse interferences". 2015.
  48. Gonçalves, C.S.; Silva, A.S.; Miranda, M.; Silva, F.; Oliveira, P.; Crespo, H.; Schmool, D.S.. "Novel dual-colour architecture for ultrafast spin dynamics measurements in the sub-10 fs regime". 2015.
    10.1007/978-3-319-07743-7_18
  49. Azevedo, I.; Richardson, M.; Sandford-Richardson, E.; Bernardo, L.M.; Crespo, H.. "Seeing yourself seeing". 2015.
    10.1117/12.2079531
  50. Holgado, W.; Hernández-García, C.; Alonso, B.; Miranda, M.; Silva, F.; Plaja, L.; Crespo, H.; Sola, I.J.. "Generation of XUV supercontinua through control of attosecond pulse interferences". 2015.
  51. Fabris, D.; Holgado, W.; Silva, F.; Witting, T.; Tisch, J.W.G.; Crespo, H.. "Ultrashort pulse characterisation with the d-scan technique: A single-shot implementation in the few- to single-cycle regime". 2015.
  52. F Böhle; M Kretschmar; A Jullien; M Kovacs; M Miranda; R Romero; Helder M. Crespo; et al. "Generation of 3-mJ, 4-fs CEP-stable pulses by long stretched flexible hollow fibers". 2014.
  53. Böhle, F.; Kretschmar, M.; Jullien, A.; Kovacs, M.; Miranda, M.; Romero, R.; Crespo, H.; et al. "Generation of 3-mJ, 4-fs CEP-stable pulses by long stretched flexible hollow fibers". 2014.
  54. Gonçalves, C.S.; Silva, A.S.; Navas, D.; Miranda, M.; Silva, F.; Crespo, H.; Schmool, D.S.. "Ultrafast demagnetisation and precessional dynamics in gdfeco thin films using a new pump-probe system in the sub-8 femtosecond range". 2014.
  55. F Silva; M Miranda; Helder M. Crespo. "Measuring few-cycle laser pulses: A comparative study between dispersionscan and FROG". 2013.
  56. F Silva; M Miranda; Helder M. Crespo. "Measuring few-cycle laser pulses: A comparative study between dispersionscan and FROG". 2013.
  57. Helder M. Crespo; F Silva; R Weigand. "Broadband deep-ultraviolet femtosecond pulse generation by third-order nonlinear optical processes in thin media". 2013.
  58. B Alonso; M Miranda; F Silva; V Pervak; J Rauschenberger; J S Román; I J Sola; Helder M. Crespo. "Characterization of sub-two-cycle pulses from a hollow-core fiber compressor in the spatiotemporal and spatio-spectral domains". 2013.
  59. F Silva; M Miranda; S Teichmann; M Baudisch; M Massicotte; F Koppens; J Biegert; Helder M. Crespo. "Pulse measurement from near to mid-IR using third harmonic generation dispersion scan in multilayer graphene". 2013.
  60. F Silva; M Miranda; S Teichmann; M Baudisch; M Massicotte; F Koppens; J Biegert; Helder M. Crespo. "Pulse measurement from near to mid-IR using third harmonic generation dispersion scan in multilayer graphene". 2013.
  61. B Alonso; M Miranda; F Silva; V Pervak; J Rauschenberger; J S Román; I J Sola; Helder M. Crespo. "Characterization of sub-two-cycle pulses from a hollow-core fiber compressor in the spatiotemporal and spatio-spectral domains". 2013.
  62. M Miranda; P Rudawski; C Guo; F Silva; C L Arnold; T Binhammer; Helder M. Crespo; A L'Huillier. "Ultrashort laser pulse characterization from dispersion scans: A comparison with SPIDER". 2013.
  63. F Silva; M Miranda; S Teichmann; M Baudisch; M Massicotte; F Koppens; J Biegert; Helder M. Crespo. "Near to mid-IR ultra-broadband third harmonic generation in multilayer graphene: Few-cycle pulse measurement using THG dispersion-scan". 2013.
  64. M Miranda; P Rudawski; C Guo; F Silva; C L Arnold; T Binhammer; Helder M. Crespo; A L'Huillier Anne. "Ultrashort laser pulse characterization from dispersion scans: A comparison with SPIDER". 2013.
  65. Silva, F.; Miranda, M.; Teichmann, S.; Baudisch, M.; Massicotte, M.; Koppens, F.; Biegert, J.; et al. "Pulse measurement from near to mid-IR using third harmonic generation dispersion scan in multilayer graphene". 2013.
    10.1109/CLEOE-IQEC.2013.6801052
  66. Silva, F; Miranda, M; Teichmann, S; Baudisch, M; Massicotte, M; Koppens, F; Biegert, J; et al. "Near to mid-IR ultra-broadband third harmonic generation in multilayer graphene: Few-cycle pulse measurement using THG dispersion-scan". 2013.
  67. Silva, F; Miranda, M; Crespo, H. "Measuring few-cycle laser pulses: A comparative study between dispersionscan and FROG". 2013.
    10.1109/CLEOE-IQEC.2013.6801095
  68. Miranda, M; Rudawski, P; Guo, C; Silva, F; Arnold, CL; Binhammer, T; Crespo, H; et al. "Ultrashort laser pulse characterization from dispersion scans: A comparison with SPIDER". 2013.
  69. Crespo, H; Silva, F; Weigand, R. "Broadband deep-ultraviolet femtosecond pulse generation by third-order nonlinear optical processes in thin media". 2013.
    10.1109/CLEOE-IQEC.2013.6801774
  70. Alonso, B; Miranda, M; Silva, F; Pervak, V; Rauschenberger, J; Roman, JS; Sola, IJ; Crespo, H. "Characterization of sub-two-cycle pulses from a hollow-core fiber compressor in the spatiotemporal and spatio-spectral domains". 2013.
    10.1109/CLEOE-IQEC.2013.6801049
  71. Francisco Silva; Miguel Miranda; Stephan Teichmann; Matthias Baudisch; Mathieu Massicotte; Frank Koppens; Jens Biegert; Helder M. Crespo. "Near to mid-IR ultra-broadband third harmonic generation in multilayer graphene: few-cycle pulse measurement using THG dispersion-scan". 2013.
    10.1364/cleo_si.2013.cw1h.5
  72. Miguel Miranda; Piotr Rudawski; Chen Guo; Francisco Silva; Cord L Arnold; Thomas Binhammer; Helder M. Crespo; Anne L’Huillier. "Ultrashort laser pulse characterization from dispersion scans: a comparison with SPIDER". 2013.
    10.1364/cleo_qels.2013.jth2a.31
  73. Alonso, B.; Miranda, M.; Sola, I.J.; Crespo, H.. "Few-cycle pulses measured in the spatiotemporal domain". 2012.
  74. Amorim, A.A.; Bernardo, L.M.; Kärtner, F.X.; Crespo, H.M.; Kartner, F.X.. "Carrier-envelope phase stabilized soliton-effect compressed sub-two-cycle pulse source". 2010.
    10.1364/up.2010.me33
  75. Alexandra A. Amorim; Lu\'{i. "Carrier-Envelope Phase Stabilized Soliton-Effect Compressed Sub-Two-Cycle Pulse Source". 2010.
    10.1364/UP.2010.ME33
  76. M N Miranda; P B Oliveira; L M Bernardo; F X Kärtner; Helder M. Crespo. "Space-time focusing of phase-stabilized nanojoule-level 2.5-cycle pulses to peak intensities >3x1013 W/cm2 at 80 MHz". 2009.
  77. Silva, J.L.; Weigand, R.; Crespo, M.H.; Crespo, H.M.. "Highly nondegenerate cascaded four-wave mixing of femtosecond pulses: 2d simulation and experiment". 2009.
    10.1109/cleoe-eqec.2009.5196388
  78. Amorim, A.A.; Tognetti, M.; Oliveira, P.; Bernardo, L.M.; Kärtner, F.X.; Crespo, H.; Kartner, F.X.. "Experimental demonstration of sub-two-cycle soliton-effect pulse compression in a photonic crystal fiber". 2009.
    10.1109/cleoe-eqec.2009.5196370
  79. Miranda, M.N.; Oliveira, P.B.; Bernardo, L.M.; Kärtner, F.X.; Crespo, H.M.. "Space-time focusing of phase-stabilized nanojoule-level 2.5-cycle pulses to peak intensities >3×1013 w/cm2 at 80 mhz". 2009.
    10.1109/cleoe-eqec.2009.5196426
  80. Birge, J.R.; Crespo, H.M.; Sander, M.; Kärtner, F.X.. "Non-intrusive sub-two-cycle carrier-envelope stabilized pulses using engineered chirped mirrors". 2008.
    10.1109/CLEO.2008.4551591
  81. Crespo, H.M.; Rosa, C.C.. "Femtosecond lasers for optical coherence tomography". 2008.
    10.1117/12.821852
  82. Tognetti, M.V.; Miranda, M.N.; Crespo, H.M.; Bernardo, L.M.. "Dispersion-managed soliton operation of Ti:sapphire laser oscillators". 2006.
    10.1117/12.662858
  83. Amorim, A.A.; Crespo, H.M.; Miranda, M.; Silva, J.L.; Bernardo, L.M.. "Study of non-solitonic blue-green radiation generated in mm-long photonic crystal fibres". 2006.
    10.1117/12.662814
  84. Silva, J.L.; Crespo, H.; Miranda, M.; Bernardo, L.M.. "Limits in high energy laser pulse compression using gas-filled hollow fibres". 2006.
    10.1117/12.662884
  85. Mendonça, J.T.; Guerreiro, A.; Crespo, H.. "Time refraction of short laser pulses in optical fibers". 2004.
    10.1117/12.549110
  86. Bernardo, L.M.; Crespo, H.; Amorim, A.A.; Mendonça, J.T.. "Nonlinear control of low-energy ultrashort laser pulses by cross-phase modulation in a photonic crystal fiber". 2004.
    10.1117/12.548996
  87. Mendonca, JT; Crespo, H. "Nonlinear phase-locking of parametric optical processes: the sliding resonance effect". 2004.
  88. Oliveira, Rosa M.; Bernardo, Luis M.; Crespo, Helder; Oliveira, R.M.; Bernardo, L.M.; Crespo, H.. "Holographic portraits: from reality to artistic creation". 2004.
    10.1117/12.526875
  89. Oliveira, Rosa M.; Bernardo, Luis M.; Crespo, Helder. "Holographic portraits: from reality to artistic creation". 2004.
    10.1117/12.526875
  90. Helder M. Crespo; A Guerreiro; M A Cataluna; J T Mendonça. "High-order self-dispersion-compensation in a Ti:sapphire laser oscillator". 2002.
  91. Crespo, H.; Mendonça, J.T.; Guerreiro, A.. "Application of highly nondegenerate cascaded four-wave mixing to high order harmonic generation". 2001.
    10.1117/12.425542
Journal article
  1. Chen Guo; Miguel Miranda; Ann-Kathrin Raab; Anne-Lise Viotti; Paulo Tiago Guerreiro; Rosa Romero; Helder Crespo; Anne L’Huillier; Cord L. Arnold. "Single-shot, high-repetition rate carrier-envelope-phase detection of ultrashort laser pulses". Optics Letters (2023): https://doi.org/10.1364/OL.498664.
    10.1364/OL.498664
  2. Freitas, SC; Belo, JH; Granja, A; Canhota, M; Silva, AS; Reis, S; Crespo, H; Araujo, JP; Sousa, CT. "Key Parameters in Phototherapy with Gold Nanorods Using Continuous Near Infrared Radiation". ADVANCED MATERIALS INTERFACES (2023):
    10.1002/admi.202202214
  3. Marios Maimaris; Allan J. Pettipher; Mohammed Azzouzi; Daniel J. Walke; Xijia Zheng; Andrei Gorodetsky; Yifan Dong; et al. "Sub-10-fs observation of bound exciton formation in organic optoelectronic devices". Nature Communications (2022): https://doi.org/10.1038/s41467-022-32478-8.
    10.1038/s41467-022-32478-8
  4. Tiago Gomes; Miguel Canhota; Helder Crespo. "Temporal characterization of broadband femtosecond laser pulses by a surface third-harmonic dispersion scan with a ptychographic retrieval". Optics Letters (2022): https://doi.org/10.1364/OL.460069.
    10.1364/OL.460069
  5. Almagro Ruiz, A; Torres Peiro, S; Munoz Marco, H; Cunquero, M; Castro Olvera, G; Dauliat, R; Jamier, R; et al. "Few-cycle all-fiber supercontinuum laser for ultrabroadband multimodal nonlinear microscopy". OPTICS EXPRESS (2022):
    10.1364/oe.454726
  6. Silva, A.S.; Sá, S.P.; Bunyaev, S.A.; Garcia, C.; Sola, I.J.; Kakazei, G.N.; Crespo, H.; Navas, D.. "Dynamical behaviour of ultrathin [CoFeB (tCoFeB)/Pd] films with perpendicular magnetic anisotropy". Scientific Reports 11 1 (2021): http://www.scopus.com/inward/record.url?eid=2-s2.0-85098968778&partnerID=MN8TOARS.
    10.1038/s41598-020-79632-0
  7. Benjamín Alonso; Salvador Torres-Peiró; Rosa Romero; Paulo T. Guerreiro; Azahara Almagro-Ruiz; Héctor Muñoz-Marco; Pere Pérez-Millán; Helder Crespo. "Detection and elimination of pulse train instabilities in broadband fibre lasers using dispersion scan". Scientific Reports (2020): https://doi.org/10.1038/s41598-020-64109-x.
    10.1038/s41598-020-64109-x
  8. Crespo, HM; Witting, T; Canhota, M; Miranda, M; Tisch, JWG; Helder M. Crespo; Tobias Witting; et al. "In situ temporal measurement of ultrashort laser pulses at full power during high-intensity laser-matter interactions". OPTICA (2020): https://doi.org/10.1364/OPTICA.398319.
    10.1364/optica.398319
  9. Salgado Remacha, FJ; Alonso, B; Crespo, H; Cojocaru, C; Trull, J; Romero, R; Lopez Ripa, M; et al. "Single-shot d-scan technique for ultrashort laser pulse characterization using transverse second-harmonic generation in random nonlinear crystals". OPTICS LETTERS (2020): https://doi.org/10.1364/OL.397033.
    10.1364/ol.397033
  10. Christian Maibohm; Francisco Silva; Edite Figueiras; Paulo T. Guerreiro; Marina Brito; Rosa Romero; Helder Crespo; Jana B. Nieder. "SyncRGB-FLIM: synchronous fluorescence imaging of red, green and blue dyes enabled by ultra-broadband few-cycle laser excitation and fluorescence lifetime detection". Biomedical Optics Express (2019): https://doi.org/10.1364/BOE.10.001891.
    10.1364/boe.10.001891
  11. Miguel Canhota; Rosa Weigand; Helder M. Crespo. "Simultaneous measurement of two ultrashort near-ultraviolet pulses produced by a multiplate continuum using dual self-diffraction dispersion-scan". Optics Letters (2019): https://doi.org/10.1364/OL.44.001015.
    10.1364/ol.44.001015
  12. Tajalli, A; Ouille, M; Vernier, A; Bottle, F; Escoto, E; Kleinert, S; Romero, R; et al. "Propagation Effects in the Characterization of 1.5-Cycle Pulses by XPW Dispersion Scan". IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS (2019):
    10.1109/JSTQE.2018.2867442
  13. Miranda, M; Silva, F; Neoricic, L; Guo, C; Pervak, V; Canhota, M; Silva, AS; et al. "All-optical measurement of the complete waveform of octave-spanning ultrashort light pulses". OPTICS LETTERS (2019):
    10.1364/ol.44.000191
  14. Silva, AS; Hierro Rodriguez, A; Bunyaev, SA; Kakazei, GN; Dobrovolskiy, OV; Redondo, C; Morales, R; Crespo, H; Navas, D. "Magnetic properties of permalloy antidot array fabricated by interference lithography". AIP ADVANCES (2019):
    10.1063/1.5080111
  15. E. Conejero Jarque; J. San Roman; F. Silva; R. Romero; W. Holgado; M. A. Gonzalez-Galicia; B. Alonso; I. J. Sola; H. Crespo. "Universal route to optimal few- to single-cycle pulse generation in hollow-core fiber compressors". Scientific Reports 8 1 (2018): https://doi.org/10.1038/s41598-018-20580-1.
    10.1038/s41598-018-20580-1
  16. Francisco Silva; Benjamín Alonso; Warein Holgado; Rosa Romero; Julio San Román; Enrique Conejero Jarque; Hans Koop; et al. "Strategies for achieving intense single-cycle pulses with in-line post-compression setups". Optics Letters 43 2 (2018): 337-337. https://doi.org/10.1364/OL.43.000337.
    10.1364/ol.43.000337
  17. Canhota, M.; Silva, F.; Weigand, R.; Crespo, H.M.. "Inline self-diffraction dispersion-scan of over octave-spanning pulses in the single-cycle regime". Optics Letters 42 15 (2017): 3048-3051. http://www.scopus.com/inward/record.url?eid=2-s2.0-85026443649&partnerID=MN8TOARS.
    10.1364/ol.42.003048
  18. Holgado, W.; Hernández-García, C.; Alonso, B.; Miranda, M.; Silva, F.; Varela, O.; Hernández-Toro, J.; et al. "Tunable high-harmonic generation by chromatic focusing of few-cycle laser pulses". Physical Review A 95 6 (2017): http://www.scopus.com/inward/record.url?eid=2-s2.0-85026796809&partnerID=MN8TOARS.
    10.1103/physreva.95.063823
  19. Goncalves, C.S.; Silva, A.S.; Navas, D.; Miranda, M.; Silva, F.; Crespo, H.; Schmool, D.S.. "A Dual-Colour Architecture for Pump-Probe Spectroscopy of Ultrafast Magnetization Dynamics in the Sub-10-femtosecond Range". Scientific Reports 6 (2016): http://www.scopus.com/inward/record.url?eid=2-s2.0-84962614872&partnerID=MN8TOARS.
    10.1038/srep22872
  20. Holgado, W; Hernandez Garcia, C; Alonso, B; Miranda, M; Silva, F; Plaja, L; Crespo, H; et al. "Continuous spectra in high-harmonic generation driven by multicycle laser pulses". PHYSICAL REVIEW A 93 1 (2016): 3816-3816. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=CCC&KeyUT=CCC:000368289000008&KeyUID=CCC:000368289000008.
    10.1103/PhysRevA.93.013816
  21. Fabris, D.; Holgado, W.; Silva, F.; Witting, T.; Tisch, J. W. G.; Crespo, H.. "Single-shot implementation of dispersion-scan for the characterization of ultrashort laser pulses". Optics Express 23 25 (2015): 32803-32808. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000366687200115&KeyUID=WOS:000366687200115.
    10.1364/oe.23.032803
  22. Weigand, Rosa; Crespo, Helder M.. "Fundamentals of Highly Non-Degenerate Cascaded Four-Wave Mixing". Applied Sciences-Basel 5 3 (2015): 485-515. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000362644500022&KeyUID=WOS:000362644500022.
    10.3390/app5030485
  23. Hernandez-Garcia, C.; Holgado, W.; Plaja, L.; Alonso, B.; Silva, F.; Miranda, M.; Crespo, H.; Sola, I. J.. "Carrier-envelope-phase insensitivity in high-order harmonic generation driven by few-cycle laser pulses". Optics Express 23 16 (2015): 21497-21508. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000361036400120&KeyUID=WOS:000361036400120.
    10.1364/OE.23.021497
  24. Weigand, R.; Pinto, T.; Crespo, H. M.; Guerra, J. M.. "On the Q-switched operation of Titanium:Sapphire lasers using a graphene-based saturable absorber mirror". Optics and Laser Technology 72 (2015): 1-5. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000357906000001&KeyUID=WOS:000357906000001.
    10.1016/j.optlastec.2015.03.007
  25. Böhle, F.; Kretschmar, M.; Jullien, A.; Kovacs, M.; Miranda, M.; Romero, R.; Crespo, H.; et al. "Compression of CEP-stable multi-mJ laser pulses down to 4 fs in long hollow fibers". Laser Physics Letters 11 9 (2014): http://www.scopus.com/inward/record.url?eid=2-s2.0-84906815205&partnerID=MN8TOARS.
    10.1088/1612-2011/11/9/095401
  26. Silva, F.; Miranda, M.; Alonso, B.; Rauschenberger, J.; Pervak, V.; Crespo, H.. "Simultaneous compression, characterization and phase stabilization of GW-level 1.4 cycle VISNIR femtosecond pulses using a single dispersion-scan setup". Optics Express 22 9 (2014): 10181-10190. http://www.scopus.com/inward/record.url?eid=2-s2.0-84899860984&partnerID=MN8TOARS.
    10.1364/oe.22.010181
  27. Weigand, R.; Miranda, M.; Crespo, H.. "Oscilador láser de titanio: Zafiro de 2 ciclos ópticos". Optica Pura y Aplicada 46 2 (2013): 105-110. http://www.scopus.com/inward/record.url?eid=2-s2.0-84880743253&partnerID=MN8TOARS.
    10.7149/opa.46.2.105
  28. Weigand, R.; Crespo, H.M.. "Generation of high-energy broadband femtosecond deep-ultraviolet pulses by highly nondegenerate noncollinear four-wave mixing in a thin transparent solid". Applied Physics B: Lasers and Optics 111 4 (2013): 559-565. http://www.scopus.com/inward/record.url?eid=2-s2.0-84880923179&partnerID=MN8TOARS.
    10.1007/s00340-013-5373-x
  29. Crespo, H.; Silva, F.; Weigand, R.; IEEE. "Broadband deep-ultraviolet femtosecond pulse generation by third-order nonlinear optical processes in thin media". 2013 Conference on and International Quantum Electronics Conference Lasers and Electro-Optics Europe (Cleo Europe/iqec) (2013): http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000355316301484&KeyUID=WOS:000355316301484.
  30. Silva, Francisco; Miranda, Miguel; Crespo, Helder; IEEE. "Measuring few-cycle laser pulses: a comparative study between dispersion-scan and FROG". 2013 Conference on and International Quantum Electronics Conference Lasers and Electro-Optics Europe (Cleo Europe/iqec) (2013): http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000355316300504&KeyUID=WOS:000355316300504.
    10.1109/CLEOE-IQEC.2013.6801095
  31. Alonso, Benjamin; Miranda, Miguel; Silva, Francisco; Pervak, Vladimir; Rauschenberger, Jens; San Roman, Julio; Sola, Inigo J.; et al. "Characterization of sub-two-cycle pulses from a hollow-core fiber compressor in the spatiotemporal and spatio-spectral domains". 2013 Conference on and International Quantum Electronics Conference Lasers and Electro-Optics Europe (Cleo Europe/iqec) 112 1 (2013): 105-114. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000355316300458&KeyUID=WOS:000355316300458.
    10.1007/s00340-013-5406-5
  32. Amorim, A.A.; Bernardo, L.M.; Kärtner, F.X.; Crespo, H.M.. "Direct carrier-envelope phase stabilization of a soliton-effect compressed sub-two-cycle pulse source through nonlinear mixing of solitonic and dispersive waves". Applied Physics B: Lasers and Optics 111 4 (2013): 659-664. http://www.scopus.com/inward/record.url?eid=2-s2.0-84880895060&partnerID=MN8TOARS.
    10.1007/s00340-013-5393-6
  33. Alonso, B.; Miranda, M.; Sola, I.J.; Crespo, H.. "Erratum: Spatiotemporal characterization of few-cycle laser pulses (Optics Express (2012) 20: 16 (17880-17893))". Optics Express 21 5 (2013): 5582-5584. http://www.scopus.com/inward/record.url?eid=2-s2.0-84875161768&partnerID=MN8TOARS.
    10.1364/oe.21.005582
  34. Miranda, M.; Fordell, T.; Arnold, C.; L'Huillier, A.; Crespo, H.. "Simultaneous compression and characterization of ultrashort laser pulses using chirped mirrors and glass wedges". Optics Express 20 1 (2012): 688-697. http://www.scopus.com/inward/record.url?eid=2-s2.0-84855470701&partnerID=MN8TOARS.
    10.1364/oe.20.000688
  35. Miranda, M.; Arnold, C.L.; Fordell, T.; Silva, F.; Alonso, B.; Weigand, R.; L'Huillier, A.; Crespo, H.. "Characterization of broadband few-cycle laser pulses with the d-scan technique". Optics Express 20 17 (2012): 18732-18743. http://www.scopus.com/inward/record.url?eid=2-s2.0-84865580433&partnerID=MN8TOARS.
    10.1364/OE.20.018732
  36. Alonso, B.; Miranda, M.; Sola, I.J.; Crespo, H.. "Spatiotemporal characterization of few-cycle laser pulses". Optics Express 20 16 (2012): 17880-17893. http://www.scopus.com/inward/record.url?eid=2-s2.0-84864634076&partnerID=MN8TOARS.
    10.1364/oe.20.017880
  37. Silva, J.L.; Crespo, H.M.; Weigand, R.. "Generation of high-energy vacuum UV femtosecond pulses by multiple-beam cascaded four-wave mixing in a transparent solid". Applied Optics 50 14 (2011): 1968-1973. http://www.scopus.com/inward/record.url?eid=2-s2.0-79958697368&partnerID=MN8TOARS.
    10.1364/ao.50.001968
  38. Birge, J.R.; Crespo, H.M.; Kärtner, F.X.. "Theory and design of two-dimensional spectral shearing interferometry for few-cycle pulse measurement". Journal of the Optical Society of America B: Optical Physics 27 6 (2010): 1165-1173. http://www.scopus.com/inward/record.url?eid=2-s2.0-77955694658&partnerID=MN8TOARS.
    10.1364/JOSAB.27.001165
  39. Silva, J.L.; Weigand, R.; Crespo, H.M.. "Octave-spanning spectra and pulse synthesis by nondegenerate cascaded four-wave mixing". Optics Letters 34 16 (2009): 2489-2491. http://www.scopus.com/inward/record.url?eid=2-s2.0-68949165681&partnerID=MN8TOARS.
    10.1364/OL.34.002489
  40. Amorim, A.A.; Tognetti, M.V.; Oliveira, P.; Silva, J.L.; Bernardo, M.; Kärtner, F.X.; Crespo, H.M.. "Sub-two-cycle pulses by soliton self-compression in highly nonlinear photonic crystal fibers". Optics Letters 34 24 (2009): 3851-3853. http://www.scopus.com/inward/record.url?eid=2-s2.0-72649093131&partnerID=MN8TOARS.
    10.1364/OL.34.003851
  41. Sander, M.Y.; Birge, J.; Benedick, A.; Crespo, H.M.; Kärtner, F.X.. "Dynamics of dispersion managed octave-spanning titanium: Sapphire lasers". Journal of the Optical Society of America B: Optical Physics 26 4 (2009): 743-749. http://www.scopus.com/inward/record.url?eid=2-s2.0-65249144563&partnerID=MN8TOARS.
    10.1364/josab.26.000743
  42. Weigand, R.; Mendonça, J.T.; Crespo, H.M.. "Cascaded nondegenerate four-wave-mixing technique for high-power single-cycle pulse synthesis in the visible and ultraviolet ranges". Physical Review A - Atomic, Molecular, and Optical Physics 79 6 (2009): http://www.scopus.com/inward/record.url?eid=2-s2.0-67649422300&partnerID=MN8TOARS.
    10.1103/PhysRevA.79.063838
  43. Cerdán, L.; Weigand, R.; Pérez, J.M.G.; Crespo, H.. "A simple experiment on slow light in ruby". American Journal of Physics 76 9 (2008): 826-832. http://www.scopus.com/inward/record.url?eid=2-s2.0-51749087037&partnerID=MN8TOARS.
    10.1119/1.2907775
  44. Crespo, H.M.; Birge, J.R.; Sander, M.Y.; Falcão-Filho, E.L.; Benedick, A.; Kärtner, F.X.. "Phase stabilization of sub-two-cycle pulses from prismless octave-spanning Ti:sapphire lasers". Journal of the Optical Society of America B: Optical Physics 25 7 (2008): http://www.scopus.com/inward/record.url?eid=2-s2.0-51849165681&partnerID=MN8TOARS.
    10.1364/JOSAB.25.00B147
  45. Crespo, H.M.; Birge, J.R.; Falcão-Filho, E.L.; Sander, M.Y.; Benedick, A.; Kärtner, F.X.. "Nonintrusive phase stabilization of sub-two-cycle pulses from a prismless octave-spanning Ti:sapphire laser". Optics Letters 33 8 (2008): 833-835. http://www.scopus.com/inward/record.url?eid=2-s2.0-43249086940&partnerID=MN8TOARS.
    10.1364/ol.33.000833
  46. Tognetti, M.V.; Crespo, H.M.. "Sub-two-cycle soliton-effect pulse compression at 800 nm in photonic crystal fibers". Journal of the Optical Society of America B: Optical Physics 24 6 (2007): 1410-1415. http://www.scopus.com/inward/record.url?eid=2-s2.0-34347399331&partnerID=MN8TOARS.
    10.1364/josab.24.001410
  47. Tognetti, M.V.; Miranda, M.N.; Crespo, H.M.. "Dispersion-managed mode-locking dynamics in a Ti:sapphire laser". Physical Review A - Atomic, Molecular, and Optical Physics 74 3 (2006): http://www.scopus.com/inward/record.url?eid=2-s2.0-33748713836&partnerID=MN8TOARS.
    10.1103/PhysRevA.74.033809
  48. Weigand, R.; Crespo, H.; Balcou, P.. "Sub- and superluminal velocity of supercontinuum pulses propagating in scattering media". Applied Physics B: Lasers and Optics 85 1 (2006): 105-115. http://www.scopus.com/inward/record.url?eid=2-s2.0-33748706786&partnerID=MN8TOARS.
    10.1007/s00340-006-2344-5
  49. Weigand, R.; Crespo, H.; Sastre, R.. "Study of the broad-band saturable absorption of indocyanine green J-aggregates in polymeric films using 10-fs laser pulses". Applied Physics B: Lasers and Optics 82 2 SPEC. IS (2006): 303-308. http://www.scopus.com/inward/record.url?eid=2-s2.0-30544450257&partnerID=MN8TOARS.
    10.1007/s00340-005-2099-4
  50. Mendonça, J.T.; Crespo, H.. "Sliding resonance of parametric optical processes". Optics Communications 222 1-6 (2003): 405-411. http://www.scopus.com/inward/record.url?eid=2-s2.0-0038141329&partnerID=MN8TOARS.
    10.1016/s0030-4018(03)01538-4
  51. Weigand, R.; Crespo, H.; Dos Santos, A.; Balcou, P.. "Time-resolved study of the spectral characteristics of supercontinuum pulses propagating in scattering media". Applied Physics B: Lasers and Optics 77 2-3 (2003): 253-257. http://www.scopus.com/inward/record.url?eid=2-s2.0-0141887217&partnerID=MN8TOARS.
    10.1007/s00340-003-1208-5
  52. Crespo, H.; Cataluna, M.A.; Guerreiro, A.; Mendonça, J.T.. "High-order self-dispersion-compensation in a Ti:sapphire laser oscillator". Springer Series in Chemical Physics 71 (2003): 161-163. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000182432900050&KeyUID=WOS:000182432900050.
    10.1007/978-3-642-59319-2_50
  53. Cataluna, MA; Crespo, H; Guerreiro, A; Mendonca, JT; Cataluna, M.A.; Crespo, H.; Guerreiro, A.; Mendonça, J.T.. "Nonlinear mode coupling in a CW operating Ti: Sapphire laser oscillator". PHYSICA SCRIPTA 98 (2002): 134-136. https://www.authenticus.pt/P-000-RRH.
    10.1238/physica.topical.098a00134
  54. Dias, F.M.; Tatarova, E.; Crespo, H.; Ferreira, C.M.. "A laser photodetachment technique for the measurement of H- in a high frequency traveling wave discharge". Review of Scientific Instruments 72 3 (2001): 1680-1687. http://www.scopus.com/inward/record.url?eid=2-s2.0-0035275014&partnerID=MN8TOARS.
    10.1063/1.1319861
  55. Mendonça, J.T.; Crespo, H.; Guerreiro, A.. "New method for high-harmonic generation by cascaded four-wave mixing". Optics Communications 188 5-6 (2001): 383-388. http://www.scopus.com/inward/record.url?eid=2-s2.0-0035246774&partnerID=MN8TOARS.
    10.1016/S0030-4018(01)00986-5
  56. Crespo, H.; Mendonca, J. T.; Dos Santos, A.. "Cascaded highly nondegenerate four-wave-mixing phenomenon in transparent isotropic condensed media". Optics Letters 25 11 (2000): 829-831. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000087458900020&KeyUID=WOS:000087458900020.
    10.1364/ol.25.000829
Activities

Supervision

Thesis Title
Role 		Degree Subject (Type)
Institution / Organization
2020 - 2020 New approaches for ultrafast laser pulse characterization using enhanced Graphene based materials
Supervisor
 Engenharia Física (Master)
Universidade do Porto Faculdade de Ciências, Portugal
2019 - 2019 Characterization of ultrashort laser pulses: towards a cost-effective solution
Supervisor
 Engenharia Física (Master)
Universidade do Porto Faculdade de Ciências, Portugal
2019 - 2019 Development and application of Laser hologram production techniques for the teaching of Physics and the public awareness of science
Supervisor
 Física (Master)
Universidade do Porto Faculdade de Ciências, Portugal
2018 - 2018 Nonlinear optical spectroscopy for the study of chemical species and nanomaterials
Supervisor
 Física (PhD)
Universidade do Porto Faculdade de Ciências, Portugal
2018 - 2018 Few-cycle laser for realtime nanomedicine research
Supervisor
 Engenharia Física (Master)
Universidade do Porto Faculdade de Ciências, Portugal
2014 - 2014 Femtosecond Pump-Probe Spectroscopy for Studies of the Ultrafast Carrier Dynamics in Graphene
Supervisor
 Engenharia Física (Master)
Universidade do Porto Faculdade de Ciências, Portugal
2013 - 2013 Ultrafast Saturable Absorption in Single-Layer Graphene with Application to Broadband Mode-Locking
Supervisor
 Física (Master)
Universidade do Porto Faculdade de Ciências, Portugal
2012 - 2012 Ultrashort light pulses over large spectral ranges: Novel sources and dispersion-scan-based Spatiotemporal diagnostics
Supervisor
 Física (PhD)
Universidade do Porto Faculdade de Ciências, Portugal
2011 - 2011 Novel dual-colour architecture for ultrafast spin dynamics measurements in sub-8 fs regime
Supervisor
 Física (PhD)
Universidade do Porto Faculdade de Ciências, Portugal
2010 - 2010 Sources and Diagnostics for Attosecond Science
Supervisor
 Física (PhD)
Universidade do Porto Faculdade de Ciências, Portugal
2009 - 2009 Analisis and Development of Ultrafast Laser Pulses
Co-supervisor
 Física (PhD)
Universidade do Porto Faculdade de Ciências, Portugal
2006 - 2006 Nonlinear Propagation and Interaction of Ultrafast Laser Pulses in the Few-cycle Regime
Supervisor
 Física (PhD)
Universidade do Porto Faculdade de Ciências, Portugal

Event organisation

Event name
Type of event (Role) 		Institution / Organization
2024/01/01 - 2025/12/31 Ultrafast Optics - UFO XIV 2025: UFO is the premier international conference focused on the science and technology of generating, manipulating, and measuring ultrafast laser sources. It is independently organized by scientists in the field, with strong support from industrial partners. The 2025 edition will take place in the Azores Islands, Portugal, from 5-10 October 2025. If you are really interested and this field is not just another filler, please have a look at: https://ufo2025.fc.up.pt (2025/10/05 - 2025/10/10)
Conference (Other)
 Science & Technology Facilities Council Central Laser Facility, United Kingdom
Distinctions

Other distinction

2017 "Beacons of the Photonics Industry" Award 2017, in the category Entrepreneurs
PennWell Corp, United States
2015 Most Promising Technology award
Portugal Startups, Portugal
2013 First Prize in the Business Ideas Competition of the University of Porto – iUP25k
Universidade do Porto, Portugal
1998 Prémio Gulbenkian de Ciência - Ciências Aplicadas e Tecnologias
Fundação Calouste Gulbenkian, Portugal