Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
68 (1996), S. 2097-2099
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Excitonic photoluminescence in a transverse electric field has been studied in strained Si1−xGex/Si type-I quantum wells (QWs) in the weak field regime. With increasing electric field, a steady blue-shift of the free exciton emission energies has been observed, thereby suppressing the anticipated downward shift due to a quantum confined Stark effect. It is revealed that a field-driven decrease of the exciton binding energies gives a good account of the experimental blue-shift for a wide range of well widths, which is also in good agreement with variational calculations. We also find that the extremely small conduction band offset characteristic of stained Si1−xGex/Si type-I QWs is responsible for the absence of the Stark red-shift and the mixed dimensionality. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.115596
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