Graphene-based photonic crystal

TL;DR

This paper proposes a novel graphene-based photonic crystal with a periodic structure that can serve as effective frequency filters and waveguides in the far infrared spectrum, with reduced absorption and damping.

Contribution

It introduces a new design of photonic crystal using graphene and dielectric layers, analyzing its band structure and transmittance for the first time.

Findings

Effective frequency filtering and waveguiding in the far infrared.

Suppressed absorption and damping due to doped graphene.

Potential applications in infrared photonics.

Abstract

A novel type of photonic crystal formed by embedding a periodic array of constituent stacks of alternating graphene and dielectric discs into a background dielectric medium is proposed. The photonic band structure and transmittance of such photonic crystal are calculated. The graphene-based photonic crystals can be used effectively as the frequency filters and waveguides for the far infrared region of electromagnetic spectrum. Due to substantial suppression of absorption of low-frequency radiation in doped graphene the damping and skin effect in the photonic crystal are also suppressed. The advantages of the graphene-based photonic crystal are discussed.