Tunneling and relaxation of photogenerated carriers in near‐surface quantum wells
作者:
V. Emiliani,
B. Bonanni,
A. Frova,
M. Capizzi,
F. Martelli,
S.‐S. Stone,
期刊:
Journal of Applied Physics
(AIP Available online 1995)
卷期:
Volume 77,
issue 11
页码: 5712-5717
ISSN:0021-8979
年代: 1995
DOI:10.1063/1.359214
出版商: AIP
数据来源: AIP
摘要:
It is shown that photoluminescence emission from AlGaAs/GaAs and InGaAs/GaAs near‐surface quantum wells can be a nonlinear function of the excitation‐power density depending on the surface‐barrier thickness and on the conditions of the barrier‐oxide interface. By studying the rate‐equation system, it is shown that this nonlinear effect is mainly due to the competition between tunneling to surface states and relaxation of photogenerated carriers within the quantum well. The information about surface states that one can obtain from this nonlinear behavior is also discussed. ©1995 American Institute of Physics.
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