Direct observation of intraband carrier relaxation phenomena in semiconductors with a picosecond free-electron laser

Alec P. Mitchell; Alan H. Chin; Junichiro Kono

doi:10.1117/12.347125

29 April 1999 Direct observation of intraband carrier relaxation phenomena in semiconductors with a picosecond free-electron laser

Alec P. Mitchell, Alan H. Chin, Junichiro Kono

Author Affiliations +

Proceedings Volume 3617, Terahertz Spectroscopy and Applications; (1999) https://doi.org/10.1117/12.347125
Event: Optoelectronics '99 - Integrated Optoelectronic Devices, 1999, San Jose, CA, United States

Abstract

We have performed time-resolved terahertz (THz) - near-IR (NIR) two-color spectroscopy on InSb, using the Stanford picosecond free-electron laser synchronized with a femtosecond NIR Ti:Sapphire laser. The initial NIR pulse excites non-equilibrium electron and holes, which absorb the picosecond THz pulse. The time profile of the photo-induced absorption is a sensitive probe of intraband carrier relaxation dynamics. Using these techniques we have made the first observation of time-resolved cyclotron resonance (TRCR) of photo-created electronics in InSb for time delays from a few picoseconds to several tens of nanoseconds. This TRCR data shows possible evidence of a magnetic-field- induced LO-photon bottleneck effect. Furthermore, we have detected very unusual multi-component relaxation and photo- induced transparency under certain conditions.

Citation Download Citation

Alec P. Mitchell, Alan H. Chin, and Junichiro Kono "Direct observation of intraband carrier relaxation phenomena in semiconductors with a picosecond free-electron laser", Proc. SPIE 3617, Terahertz Spectroscopy and Applications, (29 April 1999); https://doi.org/10.1117/12.347125

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