Temperature tunable Anderson localization for surface plasmon waves propagating in a graphene single layer placed on a random InAs grating

TL;DR

This study investigates temperature-dependent Anderson localization of surface plasmon waves in a graphene layer on a disordered InAs grating, revealing controllable localization effects influenced by temperature, disorder, and structural parameters.

Contribution

It introduces a novel temperature-tunable plasmonic structure demonstrating Anderson localization control in graphene-based systems.

Findings

Anderson localization occurs at specific frequencies depending on disorder level.

Localization length varies with temperature and optical loss.

Resonance peaks shift with temperature and structural changes.

Abstract

In this paper, we propose a one-dimensional disordered plasmonic structure composed of a graphene single layer placed on a random grating composed of InAs. The propagation of a plasmonic wave through this structure is investigated numerically. By calculation of normalized localization length for systems with different disorder strengths, it is determined whether or not the system is in the localized regime. For some frequencies, depending on the disorder level, Anderson localization occurs for plasmonic waves propagating through the graphene layer. Furthermore, the effect of optical loss on the localization length is studied. By calculating the localization length at different temperatures, it is observed that Anderson localization of graphene plasmons is temperature dependent and can be controlled by changing the temperature. In the transmission spectrum for each random realization, there are some resonance peaks which are blue-shifted with increasing the temperature. Finally, the effects of Fermi energy level of the graphene layer and width of air gaps on the individual transmission resonances are examined.