Characterizing ultrashort pulses with photon energies above 1.12 eV based on transient absorption in silicon thin films
Abstract Frequency-resolved optical switching (FROSt) is a phase-matching-free characterization technique for ultrashort pulses based on transient absorption in semiconductors. So far, this technique has been limited to characterizing pulses with photon energies smaller than the bandgap of the semiconductors used. In this work, we extend the method to characterize pulses of photon energy greater than the bandgap of the semiconductor used for characterization. We demonstrate this by characterizing ultrashort visible pulses and supercontinuum using silicon (Si) thin films deposited on a sapphire substrate. We also demonstrate that visible light sources up to a repetition rate of 250 kHz can be characterized using these samples. Therefore, this study highlights the potential of FROSt as a suitable technique for the temporal characterization of weak visible to infrared pulses, including high harmonics generated in solids.
Authors
- Giulio Vampa (ORCID: https://orcid.org/0000-0001-8492-3408)
- Mayank Kumar (ORCID: https://orcid.org/0000-0002-9237-1567)
- Adrien Leblanc (ORCID: https://orcid.org/0000-0002-5894-6611)
- Heide Ibrahim (ORCID: https://orcid.org/0000-0001-6371-8501)
- François Légaré (ORCID: https://orcid.org/0000-0002-3065-7156)
- Elissa Haddad (ORCID: https://orcid.org/0009-0008-8541-5817)
- Philippe Lassonde
- Gaëtan Jargot (ORCID: https://orcid.org/0000-0002-8084-884X)
- Kosta Oubrerie (ORCID: https://orcid.org/0000-0002-6676-6856)
- Sohail A. Jalil (ORCID: https://orcid.org/0000-0002-3149-6374)
- Saadat Mokhtari
- Tristan Guay
Institutions
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Université Paris-Saclay (FR)
- Institut National de la Recherche Scientifique (CA)
- CEA Paris-Saclay (FR)
- Laboratoire d'Optique Appliquée (FR)
- Laboratoire Interactions, Dynamiques et Lasers (FR)
- Joint Attosecond Science Laboratory (CA)
Publication Details
- Journal
- Journal of Physics Photonics
- Published
- 2024-12-10
- DOI
- https://doi.org/10.1088/2515-7647/ad9cdb
- Primary Topic
- Laser-Matter Interactions and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Canada Foundation for Innovation
- Natural Sciences and Engineering Research Council of Canada
- Fonds de recherche du Québec – Nature et technologies