Femtosecond Optical Pump Induced Enhancement of Terahertz Radiation from GaAs Surface

Chin. Phys. Lett.

1995, Vol. 12

Issue (11): 689-692 DOI:

Original Articles

Femtosecond Optical Pump Induced Enhancement of Terahertz Radiation from GaAs Surface

WANG Li;HE Wenguang;YANG Guozheu;ZHANG Xicheng^*

Optical Physics Laboratory, Institute of Physics, Academia Sinica, Beijing 100080 ^*Department of Physics, Rensselaer Polytechnic Institute, Tory, NY 12180, USA

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WANG Li, HE Wenguang, YANG Guozheu et al 1995 Chin. Phys. Lett. 12 689-692

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Abstract Terahertz (THz) far infrared radiation with a subpicosecond pulse duration is generated from GaAs(100) surface illuminated by femtosecond laser pulses. By illuminating the sample with another pump pulse, we observe an enhancement of THz emission. A mechanism of photocarriers trapping by impurities and defects in the depletion layer is proposed.

Keywords: 78.47.+p

Published: 01 November 1995

PACS:

78.47.+p

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1995/V12/I11/0689

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