Novel SuperLattice Plasmon Mode in a Grating of 2D Electron Strips

TL;DR

This paper reports the discovery of a new superlattice plasmon mode in a grating of 2D electron strips on GaAs/AlGaAs heterostructures, combining experimental observations with an analytical model to advance understanding of plasmonic metasurfaces.

Contribution

It introduces a novel superlattice plasmon mode resulting from collective effects and lateral screening, supported by an analytical approach that explains its behavior.

Findings

Strong plasma resonance observed in transmission

Emergence of a new plasmon mode due to superlattice effects

Analytical model accurately describes the mode behavior

Abstract

We investigate GaAs/AlGaAs heterostructure membranes with a metasurface made up of a grating of two-dimensional electron system (2DES) strips. Experiments have revealed a strong plasma resonance in the transmission of the metasurface. We have found that a collective effect from the superlattice, along with lateral screening between the strips, leads to the emergence of a new plasmon mode in the metasurface under study. Furthermore, we develop an analytical approach that accurately describes the behavior of the discovered superlattice plasmon mode, providing new insights into the fundamental physics of plasmonic metasurface systems.