22–26 Aug 2022
Trieste Convention Centre
Europe/Zurich timezone

Detail Study for the Laser Activating Reflective Switch for THz Free Electron Laser

MOP63
22 Aug 2022, 16:00
1h 30m
Exhibition Hall (Trieste Convention Centre)

Exhibition Hall

Trieste Convention Centre

Contributed Poster FEL oscillators & IR-FEL Monday posters

Speaker

Keigo Kawase (National Institutes for Quantum and Radiological Science and Technology)

Description

THz free electron laser at SANKEN, Osaka university generates a train of THz pulses with the interval of 27 MHz in the repetition of 5 Hz. The number of pulses in a train is about 100. Single pulse energy exceeds 200 \muJ at the carrier frequency of 4.5 THz. To extract a single pulse from the train, the reflective switch of the electron-hole plasma on the surface of Gallium Arsenide wafer driven by the Ti:sapphire laser pulse was constructed and the characteristics of the switch is studied. By evaluating also the characteristics of silicon and germanium wafers, the comparison experiments are performed. In addition, the study for carrier dynamics with the time scale of microseconds by measuring the variations of reflected and transmitted THz pulses with the interval of 27 MHz are being conducted. We report the recent results of the switching for the THz pulse and its time evolution in this conference.

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Primary author

Keigo Kawase (National Institutes for Quantum and Radiological Science and Technology)

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Proceedings

Paper