Microwave magnetoplasmon absorption by a 2DEG stripe

TL;DR

This paper experimentally investigates microwave absorption in a high mobility 2DEG stripe, revealing that confined magnetoplasmon excitations dominate the spectra, with detailed analysis as functions of magnetic field, frequency, and carrier density.

Contribution

It provides new experimental insights into magnetoplasmon excitations in 2DEG stripes, including the effects of magnetic field, microwave frequency, and carrier density tuning.

Findings

Magnetoplasmon excitations dominate microwave absorption spectra.

Spectra depend on magnetic field, microwave frequency, and carrier density.

Carrier density can be tuned by illumination and monitored via photoluminescence.

Abstract

Microwave absorption by a high mobility 2DEG has been investigated experimentally using sensitive Electron Paramagnetic Resonance cavity technique. It is found that MW absorption spectra are chiefly governed by confined magnetoplasmon excitations in a 2DEG stripe. Spectra of the 2D magnetoplasmons are studied as a function of magnetic field, MW frequency and carrier density. The electron concentration is tuned by illumination and monitored using optical photoluminescence technique.