Ultrafast excitonic room temperature nonlinearity in neutron irradiated quantum wells
作者:
S. Ten,
J. G. Williams,
P. T. Guerreiro,
G. Khitrova,
N. Peyghambarian,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 70,
issue 2
页码: 158-160
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.118346
出版商: AIP
数据来源: AIP
摘要:
Sharp room temperature exciton features and complete recovery of the excitonic absorption with 21 ps time constant are demonstrated in neutron irradiated (Ga,Al)As/GaAs multiple quantum wells. Carrier lifetime reduction is consistent with the EL2 midgap defect which is efficiently generated by fast neutrons. Influence of gamma rays accompanying neutron irradiation is discussed. Neutron irradiation provides a straightforward way to control carrier lifetime in semiconductor heterostructures with minor deterioration of their excitonic properties. ©1997 American Institute of Physics.
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