Dyadic Green's function for the graphene-dielectric stack with arbitrary field and source points

TL;DR

This paper derives a dyadic Green's function for graphene-dielectric stacks with arbitrary source and field points, enabling advanced analysis of layered graphene structures and their interactions.

Contribution

It introduces a novel formulation of the dyadic Green's function for arbitrary points in graphene-dielectric stacks using scattering superposition and cylindrical wave expansions.

Findings

Validated the Green's function with graphene-based structures

Analyzed free-standing frequency-selective surfaces

Studied interactions of donor-acceptor pairs in layers

Abstract

In this paper, dyadic Green's function for a graphene-dielectric stack is formulated based on the scattering superposition method. To this end, scattering Green's function in each layer is expanded in terms of cylindrical vector wave functions with unknown coefficients. Using the Kronecker delta function in the field expansion, it is considered that the field and source points lie in the arbitrary layers. Afterward, recurrence relations for calculating the unknown expansion coefficients are derived by applying the impedance boundary conditions at the interface of a graphene sheet surrounded by two adjacent dielectric layers. The verification of the calculated coefficients is conducted by utilizing them in the analysis of graphene-based structures with different numbers of layers, including 1) free-standing frequency-selective surfaces (FSSs) and 2) parallel plates (PPs) with graphene walls. A potential application of our proposed structure is investigating the interaction of donor-acceptor pairs resided in the arbitrary layers of the graphene-dielectric stack with a desired number of layers.