Spectrum of one-dimensional plasmons in a single stripe of two-dimensional electrons

Abstract

Microwave absorption spectra of a single, narrow stripe of two-dimensional electrons have been recorded with an optical detection scheme in order to investigate the dispersion of one-dimensional (1D) plasmons. For narrow stripes the dispersion of 1D plasmons is linear up to momentum values $K=1∕W$, where $W$ is the width of the stripe. The dependencies of the 1D plasmon velocity on electron density, length, and width of the stripe were measured. We also address the behavior of the 1D transverse and longitudinal plasma modes in a perpendicular magnetic field.