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Effect of subband mixing and subband dispersion on the exciton line shape of superlattices (1990)

Zhou, J. F. ; Jung, P. S. ; Song, J. J. ; [weitere]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 56 (1990), S. 1880-1882

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Details

ISSN: 1077-3118

Quelle: AIP Digital Archive

Thema: Physik

Notizen: 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)].

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.103076

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