E0+Δ0 transitions in GaSb/AlSb quantum wells

Forchel, A.; Cebulla, U.; Tränkle, G.; Ziem, U.; Kroemer, H.; Subbanna, S.; Griffiths, G.
January 1987
Applied Physics Letters;1/26/1987, Vol. 50 Issue 4, p182
Academic Journal
We 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 Δ0 gaps is the quantum wells are determined. Contrary to previous calculations the Δ0 gap energies are almost independent of the well width.


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