Large excited state Stokes shift in crescent-shaped AlGaAs/GaAs quantum wires
作者:
Xue-Lun Wang,
Mutsuo Ogura,
Hirofumi Matsuhata,
Ali Hamoudi,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 71,
issue 15
页码: 2130-2132
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.119358
出版商: AIP
数据来源: AIP
摘要:
The Stokes shifts of the ground and the excited states in a crescent-shaped AlGaAs/GaAs quantum wire (QWR) are investigated using photoluminescence (PL) and PL excitation spectroscopy. The first excited electron to heavy-hole transition showed a Stokes shift (∼17 meV) considerably larger than that of ground state-related transitions (∼4 meV). This is a quite different phenomenon than that observed in two dimensional quantum well structures, and can be explained by the spatial separation of wave functions with different confinement energies in crescent-shaped QWRs. ©1997 American Institute of Physics.
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