Share Email Print
cover

Proceedings Paper

Ultrafast carrier transport in GaAs measured by optical pump-terahertz probe spectroscopy
Author(s): Hai-yan Yang; Yu-lei Shi; Qing-li Zhou; Dong-mei Zhao; Lei Li; Cun-lin Zhang
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Femtosecond optical pump-terahertz probe studies of carrier dynamics and transport characteristics in semi-insulating GaAs have been investigated under different pump powers at room temperature. The transmission of the terahertz pulse is monitored as a function of delay time between pump and probe pulse, we found that because the more optical generated carriers under the higher power, the terahertz transmission decreased with the increase of the optical pump power. Using a simple thin-film Drude model, carrier relaxation times and carrier mobilities were obtained by fitting the differential transmission curves. The time-dependent and frequency-dependent conductivities also have been studied.

Paper Details

Date Published: 18 November 2009
PDF: 7 pages
Proc. SPIE 7512, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Information Security, 75120K (18 November 2009); doi: 10.1117/12.838020
Show Author Affiliations
Hai-yan Yang, Capital Normal Univ. (China)
Yu-lei Shi, Capital Normal Univ. (China)
Qing-li Zhou, Capital Normal Univ. (China)
Dong-mei Zhao, Capital Normal Univ. (China)
Lei Li, Capital Normal Univ. (China)
Cun-lin Zhang, Capital Normal Univ. (China)


Published in SPIE Proceedings Vol. 7512:
2009 International Conference on Optical Instruments and Technology: Optoelectronic Information Security
Cunlin Zhang; Tiegen Liu, Editor(s)

© SPIE. Terms of Use
Back to Top