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15 March 2023 Capturing microsecond dynamics one pulse at a time: single-shot time-resolved terahertz spectroscopy at 50 kHz
Angela Gamouras, Nicolas Couture, Wei Cui, Markus Lippl, Rachel Ostic, Défi J. Jubgang Fandio, Eeswar K. Yalavarthi, Aswin V. Radhan, Nicolas Y. Joly, Jean-Michel Ménard
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Proceedings Volume PC12419, Ultrafast Phenomena and Nanophotonics XXVII; (2023) https://doi.org/10.1117/12.2647369
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
The rapid acquisition of terahertz (THz) time-domain waveforms is a significant challenge in the study of fast and non-reproducible phenomena. To increase data acquisition rates, the THz waveform can be encoded on spectral components of individual near-infrared (NIR) ultrafast laser pulses. By using dispersive Fourier transform method, where spectral information are mapped in the time domain, we demonstrate time-resolved THz-spectroscopy at an unprecedented rate of 50 kHz. With this technique, we resolve sub-millisecond dynamics of carriers in silicon injected by successive resonant pulses as a saturation density is established.
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Angela Gamouras, Nicolas Couture, Wei Cui, Markus Lippl, Rachel Ostic, Défi J. Jubgang Fandio, Eeswar K. Yalavarthi, Aswin V. Radhan, Nicolas Y. Joly, and Jean-Michel Ménard "Capturing microsecond dynamics one pulse at a time: single-shot time-resolved terahertz spectroscopy at 50 kHz", Proc. SPIE PC12419, Ultrafast Phenomena and Nanophotonics XXVII, (15 March 2023); https://doi.org/10.1117/12.2647369
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KEYWORDS
Terahertz radiation
Terahertz spectroscopy
Carrier dynamics
Near infrared
Near infrared spectroscopy
Silicon
Spectroscopy
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