Tunable THz absorption in photonic crystal including graphene and metamaterial

TL;DR

This paper investigates a tunable terahertz absorption in a photonic crystal structure incorporating graphene and metamaterials, demonstrating significant absorption enhancement and near-complete absorption across various parameters.

Contribution

It introduces a novel photonic crystal design with layered graphene and metamaterials, achieving tunable and high absorption in the terahertz range.

Findings

Adding Si, SiO2, or metamaterial layers enhances absorption.

Near-complete absorption occurs over a wide parameter range.

Metamaterial layer yields the highest absorption performance.

Abstract

In this paper, a photonic crystal containing graphene and metamaterial layers is investigated. The absorption spectrum of the structure in the terahertz range is obtained using the transfer matrix method. The results show that by adding a Si, SiO2 or metamaterial layer between two graphene layers, the terahertz absorption increases significantly. The results also reveal that in wide range of physical parameters, the approximately complete absorption occurs. Furthermore, the results indicate that the structure with metamaterial layer has the highest absorption performance.