E sub(0) + Delta sub(0) transitions in GaSb/AlSb quantum wells

The authors have observed optical transitions between the first subbands of the conduction band and the split-off valence band in GaSb/AlSb quantum well structures. The well width dependence of the emission energies is traced to quantization in the conduction band and in the split-off band. By compa...

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Bibliographic Details
Published in:Applied physics letters 1987-01, Vol.50 (4), p.182-184
Main Authors: chel, A, Cebulla, U, Traenkle, G, Ziem, U, Kroemer, H, Subbanna, S, Griffiths, G
Format: Article
Language:English
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Summary:The authors have observed optical transitions between the first subbands of the conduction band and the split-off valence band in GaSb/AlSb quantum well structures. The well width dependence of the emission energies is traced to quantization in the conduction band and in the split-off band. By comparison with data for the band-edge transitions the effective Delta sub(0) gaps in the quantum wells are determined. Contrary to previous calculations the Delta sub(0) gap energies are almost independent of the well width.
ISSN:0003-6951