Inelastic electron scattering by collective charge-density excitations at the surface of a semiconductor superlattice
- 15 September 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 32 (6) , 4272-4274
- https://doi.org/10.1103/physrevb.32.4272
Abstract
We have studied the oscillator strength of the lowest 1s heavy excitons in GaAs-AlAs quantum wells as a function of well-layer thickness by means of optical absorption. The oscillator strength of the lowest 1s heavy excitons is largely enhanced with the decrease of well-layer thickness. The result is the first full experimental observation of two-dimensional shrinkage of the exciton wave function in quantum wells.Keywords
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