Enhancing the absorption of graphene in the terahertz range

TL;DR

This paper investigates how placing graphene on a photonic crystal can significantly enhance its absorption in the terahertz range, with potential for tunable and increased absorption at specific frequencies.

Contribution

It demonstrates that graphene's absorption can be modulated and amplified using photonic crystals, providing new insights into THz device design.

Findings

Absorption of graphene can be increased by over three times at certain frequencies.

Graphene's absorption becomes a frequency-dependent, modulated function.

The study includes analysis of semi-infinite photonic crystal configurations.

Abstract

We study graphene on a photonic crystal operating in the terahertz (THz) spectral range. We show that the absorption of graphene becomes a modulated function of frequency and can be enhanced by more than three times at specific frequency values, depending on the parameters of the system. The problem of a semi-infinite photonic crystal is also solved.