Dispersion of collective intersubband excitations in semiconductor superlattices
- 15 February 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 31 (4), 2578-2580
- https://doi.org/10.1103/physrevb.31.2578
Abstract
We report the observation, by inelastic light scattering, of the dispersion of collective intersubband excitations of electrons confined in GaAs quantum-well superlattices. The ability to probe plasmons with large in-plane wave vectors allows one the unique possibility to study excitations in the two-dimensional limit. Intrasubband plasmons in this regime are also observed for the first time. The results are interpreted with current theories which include estimates of many-body effects.Keywords
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