Analysis and design of a multilayer plasmonic superlens by complex images technique

Abstract

A superlens is a slab of metal sandwiched between two dielectric layers. This structure can produce the image of an object in close vicinity without suffering from diffraction limit. Better resolution can be achieved by using a multilayer structure of metal and dielectric. In this paper, a new numerically accurate and efficient method is proposed to analyze a multilayer superlens structure. A Method of Moment (MoM) solution of the Magnetic Field Integral Equation (MFIE) formulation of the problem using Complex Images (CI) representation of the required Green's function is employed. First a single slab of silver as a superlens at 356nm and 633nm wavelengths will be analyzed, next a multilayer structure will be designed to overcome the diffraction limit of the single layer structure in the visible light frequency range.