Nonlinear Control of Absorption in Graphene-based 1D Photonic Crystal

TL;DR

This paper demonstrates how the large third-order nonlinearity of graphene enables controllable, saturable absorption in a 1D photonic crystal with a graphene defect, allowing for tunable optical absorption properties.

Contribution

It introduces a novel approach to achieve nonlinear, controllable absorption using graphene in a 1D photonic crystal structure.

Findings

Achieved perfect, narrow-band absorption in the structure.

Demonstrated controllable, saturable absorption via nonlinear effects.

Utilized field localization to enhance nonlinear response.

Abstract

Perfect, narrow-band absorption is achieved in an asymmetric 1D photonic crystal with a monolayer graphene defect. Thanks to the large third order nonlinearity of graphene and field localization in the defect layer we demonstrate the possibility to achieve controllable, saturable absorption for the pump frequency.