Large excited state Stokes shift in crescent-shaped AlGaAs/GaAs quantum wires
- 13 October 1997
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 71 (15) , 2130-2132
- https://doi.org/10.1063/1.119358
Abstract
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.Keywords
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