Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
56 (1990), S. 1880-1882
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We have found a very unusual exciton line shape in the vicinity of n=2 heavy hole states (HH2) of GaAs/AlxGa1−xAs superlattices. The excitonic structure consisting of a step, a sharp peak, and a broad asymmetric hump results from valence-band mixing between HH2 and n=1 light hole states, in conjunction with subband dispersion due to well-to-well coupling of electrons and holes. In quantum well samples with negligible subband dispersion, a distinctly different exciton line shape is observed. The observed line shape is well fitted by a theory recently reported by Chu and Chang [Phys. Rev. B 39, 10861 (1989)].
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.103076
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