Hot carrier cooling in GaSb: Bulk and quantum wells

We have investigated hot carrier dynamics in GaSb structures, bulk and quantum wells, using picosecond time-resolved photoluminescence. Bulk samples show remarkably little carrier heating which we attribute to rapid electron relaxation within the L valleys. Quantum wells show slower cooling than the...

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Bibliographic Details
Published in:Superlattices and microstructures 1989, Vol.5 (4), p.595-598
Main Authors: Snow, P.A., Westland, D.J., Ryan, J.F., Kerr, T., Munekata, H., Chang, L.L.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of specific thin films
Physics
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Summary:We have investigated hot carrier dynamics in GaSb structures, bulk and quantum wells, using picosecond time-resolved photoluminescence. Bulk samples show remarkably little carrier heating which we attribute to rapid electron relaxation within the L valleys. Quantum wells show slower cooling than the bulk, which is consistent with similar measurements of other III–V systems. Strong Auger recombination heating of the plasma is found to be responsible for maintaining relatively high temperatures at times ⩾ 25 ps.
ISSN:0749-6036
1096-3677
DOI:10.1016/0749-6036(89)90393-5