Optical and Electrical Properties of Bulk GaSb and AlGaSb
P. Kaczor, Z.R. Żytkiewicz, D. Dobosz and Ż. Kaliński
Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland
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Optical measurements of bulk GaSb:S reveal the structure of the lattice two phonon absorption and acceptor-valence band transitions. A sulphur re­lated local vibrational modes and several bands related to the optical transi­tions from the ground state of the acceptor level are observed. A comparison of transport and optical measurements for GaSb:Te and AlGaSb:Te shows that in the alloy it is easier to obtain high concentrations of the electrically active Te impurity.
DOI: 10.12693/APhysPolA.88.763
PACS numbers: 61.72.Vv, 63.20.Pw, 71.55.Eq