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Resonant mechanisms of inelastic light scattering by low-dimensional electron gases.
PubMed
Authors: Jusserand B, Vijayaraghavan MN, Laruelle F, Cavanna A, Etienne B
Year
2000
Paper ID
13272
Status
Peer-reviewed
Abstract Read
~2 min
Abstract Words
84
Citations
N/A
Abstract
The contribution of elementary excitations in low-dimensional electron gases to resonant inelastic light scattering is found to be determined by interband transitions involving states at specific wave vectors. In modulation-doped GaAs/GaAlAs quantum wells, we detect only the single-particle excitations (SPE) at resonances with electron-hole transitions at the Fermi wave vector, and only plasmons at resonances with zone-center excitons. The plasmon cross section is comparable to the SPE when double electronic resonance is achieved by tuning the plasmon energy to a valence subband separation.
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