Influence of contacts on the microwave response of a two-dimensional electron stripe

TL;DR

This paper theoretically investigates how metallic contacts affect the microwave response of a finite 2D electron stripe, revealing significant impacts on plasmon-polariton resonances and polarization-dependent absorption.

Contribution

It introduces a theoretical model showing the substantial influence of contacts on the electromagnetic response of 2D electron stripes, including resonance shifts and polarization effects.

Findings

Contacts alter plasmon-polariton resonance positions and linewidths.

Absorption of inactive circular polarization can surpass active polarization in finite magnetic fields.

Results align with recent microwave experiments in 2D electron systems.

Abstract

Electromagnetic response of a finite-width two-dimensional electron stripe with attached metallic side contacts is theoretically studied. It is shown that contacts substantially influence the position, the linewidth, and the amplitude of plasmon-polariton resonances in the stripe. In finite magnetic fields, absorption of the wave with the inactive circular polarization (which is not absorbed in an infinite system without contacts) may become larger than that of the wave with the active polarization. The results are discussed in view of recent microwave experiments in two-dimensional electron systems.