Efficient graphene-based photodetector with two cavities

TL;DR

This paper introduces a highly efficient graphene-based photodetector utilizing two Fabri-Pérot cavities, achieving near-perfect absorption at specific frequencies and demonstrating hysteresis effects influenced by cavity parameters.

Contribution

The work presents a novel design of a graphene photodetector with dual cavities that significantly enhances absorption and explores non-linear optical effects and hysteresis behavior.

Findings

Absorption reaches nearly 100% at specific frequencies.

Hysteresis in absorbance can be induced via cavity parameters.

Non-linear optical susceptibility influences device behavior.

Abstract

We present an efficient graphene-based photodetector with two Fabri-P\'erot cavities. It is shown that the absorption can reach almost 100% around a given frequency, which is determined by the two-cavity lengths. It is also shown that hysteresis in the absorbance is possible, with the transmittance amplitude of the mirrors working as an external driving field. The role of non-linear contributions to the optical susceptibility of graphene is discussed.