Observation of optically pumped midinfrared intersubband luminescence in a coupled quantum wells structure
作者:
Y. Lavon,
A. Sa’ar,
Z. Moussa,
F. H. Julien,
R. Planel,
期刊:
Applied Physics Letters
(AIP Available online 1995)
卷期:
Volume 67,
issue 14
页码: 1984-1986
ISSN:0003-6951
年代: 1995
DOI:10.1063/1.114761
出版商: AIP
数据来源: AIP
摘要:
We have observed midinfrared emission due to intersubband transitions in a coupled quantum wells structure. The excitation process involves optical pumping of the carriers from the ground subband into the third subband and a generation of a population in the third subband. The luminescence is produced by a radiative transition of the photoexcited carriers from the third to the second subband, followed by a fast relaxation into the ground subband due to a resonance LO‐phonon assisted relaxation process. The emission signal persists from low temperatures up to room temperature with a maximum efficiency at 190 K. ©1995 American Institute of Physics.
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