Subband separation energy dependence of intersubband relaxation time in wide quantum wells
作者:
Kejian Luo,
Houzhi Zheng,
Zhendong Lu,
Jizong Xu,
Zhongying Xu,
Ting Zhang,
Chengfang Li,
Xiaoping Yang,
Jinfa Tian,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 70,
issue 9
页码: 1155-1157
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.118511
出版商: AIP
数据来源: AIP
摘要:
Subband separation energy dependence of intersubband relaxation time in a wide quantum well (250 Å) was studied by steady-state and time-resolved photoluminescence. By applying a perpendicular electrical field, the subband separation energy in the quantum well is continuously tuned from 21 to 40 meV. As a result, it is found that the intersubband relaxation time undergoes a drastic change from several hundred picoseconds to subpicoseconds. It is also found that the intersubband relaxation has already become very fast before the energy separation really reaches one optical phonon energy.©1997 American Institute of Physics.
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