One-dimensional plasmons in AlGaAs/GaAs quantum wires

T. Demel, D. Heitmann, P. Grambow, and K. Ploog
Phys. Rev. Lett. 66, 2657 – Published 20 May 1991
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Abstract

Quasi-one-dimensional electronic systems have been realized in deep-mesa-etched AlGaAs/GaAs quantum wires. By means of a metallic grating coupler oriented perpendicularly to the wires, we could couple far-infrared radiation to one-dimensional plasmons propagating along the wires. The most prominent feature of the one-dimensional plasmon is a wire-width-dependent negative dispersion in a magnetic field, which is a unique property of edge-plasmon-type oscillations. In addition, we observe a rich spectrum of further modes which arise from the mixing between the one-dimensional plasmon and a charge oscillation perpendicular to the wires.

  • Received 17 December 1990

DOI:https://doi.org/10.1103/PhysRevLett.66.2657

©1991 American Physical Society

Authors & Affiliations

T. Demel, D. Heitmann, P. Grambow, and K. Ploog

  • Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-7000 Stuttgart 80, Federal Republic of Germany

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Vol. 66, Iss. 20 — 20 May 1991

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