Green's function for metamaterial superlens: Evanescent wave in the image

TL;DR

This paper introduces a Green's function-based method to analyze evanescent and radiative waves in metamaterial superlenses, enabling better understanding and design of such devices.

Contribution

A novel Green's function approach for calculating subdivided evanescent waves and radiative waves in metamaterial superlenses.

Findings

Allows direct investigation of evanescent wave effects

Provides a new tool for designing metamaterial devices

Applicable to other linear systems

Abstract

We develop a new method to calculate the evanescent wave, the subdivided evanescent waves (SEWs), and the radiative wave, which can be obtained by separating the global field of the image of metamaterial superlens. The method is based on Green's function, and it can be applied in other linear systems. This study could help us to investigate the effect of evanescent wave on metamaterial superlens directly, and give us a new way to design new devices.