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research article
Evidence of a blue shift in near surface ultra thin InAs/InP island like quantum wells
We report evidence of a large blue shift (up to 70 meV) in the photoluminescence spectra of InAs/InP island like quantum wells following the reduction of the InP top barrier layer thickness from 6 nm to near zero. The photoluminescence intensity only starts to decrease when the top barrier thickness falls below 1.5 nm, indicating that radiative recombinations in the islands are very efficient. These results are well understood by a model assuming a vacuum confinement energy close to 5 eV. (C) 1997 American Institute of Physics.
Type
research article
Authors
Publication date
1997
Published in
Volume
71
Issue
16
Start page
2331
End page
2333
Peer reviewed
REVIEWED
Available on Infoscience
October 5, 2010
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