Analysis of Electromagnetic Scattering from Array of Time-Modulated Graphene Ribbons

TL;DR

This paper introduces a rapid and accurate method for analyzing electromagnetic scattering from arrays of time-modulated graphene ribbons, enabling high-frequency modulation analysis and aiding in device design.

Contribution

The paper develops a novel time-domain integral equation approach combined with harmonic balance for fast analysis of time-modulated graphene structures.

Findings

Method matches full-wave simulation accuracy

Significantly faster analysis at higher modulation frequencies

Provides physical insights for device design

Abstract

An accurate and fast method is presented for scattering of electromagnetic waves from an array of time-modulated graphene ribbons. We derive a time-domain integral equation for induced surface currents under subwavelength approximation. Using the method of harmonic balance, this equation is solved for a sinusoidal modulation. The solution of the integral equation is then used to obtain the transmission and reflection coefficients of time-modulated graphene ribbon array. The accuracy of the method was verified through comparison with results of full-wave simulations. In contrast with previously reported analysis techniques, our method is extremely fast and can analyze structures with a much higher modulation frequency. The proposed method also provides interesting physical insights useful for designing novel applications and opens up new vistas in the fast design of time-modulated graphene-based devices.