Share Email Print
cover

Proceedings Paper

A 46μm AlGsAs/GaAs terahertz quantum-well infrared photodetector
Author(s): Xi-hui Liu; Kai-sheng Liao; Xiao-hao Zhou; Zhi-feng Li; Ning Li
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Recently infrared photodetectors have attracted much attention due to their potential use in infrared imaging, optical communications, medical detection and many other fields. In this letter, we report a THz quantum well infrared detector based on AlGaAs/GaAs material system. Structure with 4% Al content in the barrier was grown using molecular beam epitaxy (MBE). The photocurrent spectra were measured at 4.3 K with a Fourier transforming infrared spectrometer using a solid substrate far-IR beam splitter and the peak response wavelength at 46 μm was observed, close to the theoretical calculated results. The dark currents for the THz QWIP detector have been measured at different temperatures. It was found that there is a huge discontinuity in the current. We analyzed this phenomenon and believed the discontinuity in the current was caused by intersubband impact ionization of the first quantum well.

Paper Details

Date Published: 23 August 2013
PDF: 7 pages
Proc. SPIE 8909, International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications, 890912 (23 August 2013); doi: 10.1117/12.2034762
Show Author Affiliations
Xi-hui Liu, Shanghai Institute of Technical Physics (China)
Univ. of the Chinese Academy of Sciences (China)
Kai-sheng Liao, Shanghai Institute of Technical Physics (China)
Univ. of the Chinese Academy of Sciences (China)
Xiao-hao Zhou, Shanghai Institute of Technical Physics (China)
Zhi-feng Li, Shanghai Institute of Technical Physics (China)
Ning Li, Shanghai Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 8909:
International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications
Marco Rahm; Konstantin Vodopyanov; Wei Shi; Cunlin Zhang, Editor(s)

© SPIE. Terms of Use
Back to Top