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Coupling of lateral and vertical electron motion in GaAs-AlxGa1-xAs quantum wires and dots

Biese, G. ; Schüller, Christian ; Keller, K. ; Steinebach, Christoph ; Heitmann, Detlef ; Grambow, P. ; Eberl, Karl
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Date of publication of this fulltext: 25 Sep 2009 07:44


Abstract

Electronic excitations in AlxGa1-xAs-GaAs quantum wires and quantum dots have been investigated by means of resonant inelastic light scattering. At low frequencies, we find quasi-one-dimensional and quasi-zero-dimensional confined plasmons. Interestingly, we observe, at higher frequencies, not only the original two-dimensional (2D) intersubband excitations, but additional modes ωk in polarized ...

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