The wave impedance of an atomically thin crystal

TL;DR

This paper introduces an expression for the electromagnetic wave impedance of atomically thin crystals, enabling better understanding of their light absorption and energy storage capabilities.

Contribution

It proposes a novel impedance expression for 2D atomic crystals and derives Fresnel coefficients based on this, enhancing the analysis of their electromagnetic properties.

Findings

Impedance quantifies energy storage in 2D crystals.

Derived Fresnel coefficients using the new impedance expression.

Highlights energy storage potential in atomically thin materials.

Abstract

I propose an expression for the electromagnetic wave impedance of a two-dimensional atomic crystal, and I deduce the Fresnel coefficients in terms of this quantity. It is widely known that a two-dimensional crystal can absorb light, if its conductivity is different from zero. It is less emphasized that they can also store a certain amount of electromagnetic energy. The concept of impedance is useful to quantify this point.