Circuital model for the Maxwell Fish Eye perfect drain

TL;DR

This paper proposes a circuit-based model for a practical perfect drain in the Maxwell Fish Eye lens, enabling super-resolution imaging up to wavelength/3000 through simulations of a spherical waveguide with circuit-loaded probes.

Contribution

It introduces a circuital model for the perfect drain, making super-resolution in Maxwell Fish Eye devices practically achievable and simulatable.

Findings

Super-resolution up to wavelength/3000 predicted

Circuit model enables practical implementation of perfect drain

Optimum power transmission demonstrated

Abstract

Perfect drain for the Maxwell Fish Eye (MFE) is a non-magnetic dissipative region placed in the focal point to absorb all the incident radiation without reflection or scattering. The perfect drain was recently designed as a material with complex electrical permittivity that depends on frequency. However, this material is only a theoretical material, so it can not be used in practical devices. Recently, the perfect drain has been claimed as necessary to achieve super-resolution [Leonhard 2009, New J. Phys. 11 093040], which has increased the interest for practical perfect drains suitable for manufacturing. Here, we analyze the super-resolution properties of a device equivalent to the MFE, known as Spherical Geodesic Waveguide (SGW), loaded with the perfect drain. In the SGW the source and drain are implemented with coaxial probes. The perfect drain is realized using a circuit (made of a resistance and a capacitor) connected to the drain coaxial probes. Super-resolution analysis for this device is done in Comsol Multiphysics. The results of simulations predict the super-resolution up to wavelength/3000 and optimum power transmission from the source to the drain.