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Proceedings Paper

Transient mobility and photoconductive terahertz emission with GaP
Author(s): Christopher M. Collier; Brandon Born; Xian Jin; Timothy M. Westgate; Max Bethune-Waddell; Mark H. Bergen; Jonathan F. Holzman
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Paper Abstract

GaP is investigated for photoconductive terahertz (THz) generation. It is shown that the atypical bandstructure of GaP, with a central high-mobility valley and low-mobility sidevalleys, can be exploited to form a transient high-mobility state. The subsequent scattering and relaxation of hot electrons into and within the lower-mobility sidevalleys leaves the material in a relaxed low-conduction state. The experimental and theoretical study shows that ultrafast transient mobility, occurring over 800 fs, can create broadband THz pulses with reduced recovery times (and low leakage currents). The impacts of these findings are discussed for efficient and portable next-generation THz systems.

Paper Details

Date Published: 24 September 2013
PDF: 9 pages
Proc. SPIE 8846, Terahertz Emitters, Receivers, and Applications IV, 884616 (24 September 2013); doi: 10.1117/12.2023764
Show Author Affiliations
Christopher M. Collier, UBC Okanagan (Canada)
Brandon Born, UBC Okanagan (Canada)
Xian Jin, UBC Okanagan (Canada)
Timothy M. Westgate, UBC Okanagan (Canada)
Max Bethune-Waddell, UBC Okanagan (Canada)
Mark H. Bergen, UBC Okanagan (Canada)
Jonathan F. Holzman, UBC Okanagan (Canada)

Published in SPIE Proceedings Vol. 8846:
Terahertz Emitters, Receivers, and Applications IV
Manijeh Razeghi; Alexei N. Baranov; John M. Zavada, Editor(s)

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