Open AccessPhotocurrent spectra of very long wavelength GaAs/AlGaAs quantum well infrared photodetector
Author(s) -
Yuan Xian-Zhang,
Wei Lu,
Ning Li,
Xiaoshuang Chen,
Xuechu Shen,
Jian Zi
Publication year - 2003
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.52.503
Subject(s) - photocurrent , quantum well infrared photodetector , excited state , photodetector , physics , ground state , spectral line , wavelength , quantum well , optoelectronics , detector , atomic physics , materials science , optics , quantum mechanics , laser
The photocurrent spectra characteristics of the 15μm very long wavelength GaAs/AlGaAs quantum well infrared photo detector(QWIP) have been investigated.The two photocurrent response peaks, which have a Gaussian lineshape due to the random fluctuation of the well width,are attributed to the transitions from the ground state E0 to the first excited state E and the third excited state E3 in the well,respectively.The transition peaks shift linearly to higher energy as the bias across the detector increases.Taking into account electrons exchange effect,we find that the theoretical calculation using the transfer matrix method agrees well with the experimental data.