ONE-DIMENSIONAL PLASMONS IN ALGAAS/GAAS QUANTUM WIRES

被引：154

作者：

DEMEL, T

HEITMANN, D

GRAMBOW, P

PLOOG, K

机构：

[1] Max-Planck-Institut F̈r Festkörperforschung, D-7000 Stuttgart 80

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.66.2657

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

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页码：2657 / 2660

页数：4

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