Abstract
Resonance enhanced inelastic light scattering from a quasi-two-dimensional electron gas confined at the interface of abruptly doped $\mathrm{GaAs}/n\ensuremath{-}{\mathrm{Al}}_{x}{\mathrm{Ga}}_{1\ensuremath{-}x}\mathrm{As}$ heterojunctions has been measured. The samples were fabricated using molecular-beam epitaxy with a high-contrast doping technique. The results show strong evidence for intersubband excitations in a two-dimensional electron system.
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Publication Info
- Year
- 1979
- Type
- article
- Volume
- 42
- Issue
- 19
- Pages
- 1308-1311
- Citations
- 138
- Access
- Closed
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- DOI
- 10.1103/physrevlett.42.1308