Share Email Print
cover

Proceedings Paper

Terahertz reflected waves transmitted from GaAs measured by femtosecond pump-terahertz probe spectroscopy
Author(s): Qingli Zhou; Yulei Shi; Cunlin Zhang
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Femtosecond pump-terahertz probe studies of carrier dynamics in semi-insulating GaAs have been investigated in detail under various pump powers. The pump-induced attenuation of terahertz transmission and the carrier relaxation time are found to be correlated with photo-injected carrier density. These effects can be fully explained in terms of the enhanced photoconductivity and surface states filling in GaAs. Moreover, abnormal reversal and increase of terahertz reflected waves transmitted from GaAs are observed, and these phenomena arise primarily from the pump injected carriers. One-dimensional pump scans of terahertz transmission of both the main peaks and the reflection peaks are discussed to reveal the more complete studies of the dynamics of carrier transfer in GaAs.

Paper Details

Date Published: 12 August 2011
PDF: 15 pages
Proc. SPIE 8195, International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications, 81950S (12 August 2011); doi: 10.1117/12.900505
Show Author Affiliations
Qingli Zhou, Capital Normal Univ. (China)
Yulei Shi, Capital Normal Univ. (China)
Cunlin Zhang, Capital Normal Univ. (China)


Published in SPIE Proceedings Vol. 8195:
International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications
X.-C. Zhang; Jianquan Yao; Cunlin Zhang; Zhenzhan Wang, Editor(s)

© SPIE. Terms of Use
Back to Top