Observation of Tunable Band Gap and Two-Dimensional Subbands in a Novel GaAs Superlattice
- 21 September 1981
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 47 (12), 864-867
- https://doi.org/10.1103/physrevlett.47.864
Abstract
Luminescence and Raman measurements on a new type of superlattice consisting of - and -type doped GaAs layers grown by molecular-beam epitaxy confirm crucial predictions of theory. A strongly tunable energy gap is found in luminescence. Raman experiments provide the first observation of electronic subbands in purely space-charge-induced quantum wells. A combined analysis of the luminescence and Raman data yields excellent agreement with self-consistent subband calculations based only on the design parameters of the sample.
Keywords
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