Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
56 (1990), S. 1356-1358
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Photoluminescence, electroluminescence, and current measurements are used to probe the internal field in an n+-n-n+ GaAs/AlGaAs superlattice. At low bias voltages, the photoluminescence spectrum shows several peaks arising from electric field domains in the superlattice. Their positions correlate with features in the current-voltage characteristic and are consistent with a simple calculation of the Stark shift. Above the threshold voltage for impact ionization we observe spectrally narrow electroluminescence (width 3.5 meV). The energy of this emission coincides with the zero-field photoluminescence signal, indicating that electrons and holes screen the applied electric field in the quantum wells.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.102513
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