Transformation devices with optical nihility media and reduced realizations

TL;DR

This paper designs various transformation optical devices using optical nihility media, simplifying their fabrication through resonant materials and demonstrating their functionalities via simulations.

Contribution

It introduces a method to realize transformation devices with optical nihility media using simplified resonant materials, enabling feasible experimental fabrication.

Findings

Devices like wave splitters, lenses, and cloaks are successfully designed.

Simplified materials with Fabry-Pérot resonances enable practical device realization.

Simulations confirm the functionality of the proposed devices.

Abstract

Starting from optical nihility media (ONM), we design several intriguing devices with transformation optics method in two dimensions, such as a wave splitter, a concave lens, a field rotator, a concentrator and an invisibility cloak. The extreme anisotropic property of ONM hinders the fabrication of these devices, which could be effectively realized by simplified materials with Fabry-P\'erot resonances (FPs) at discrete frequencies. Moreover, we propose a reduced version of simplified materials with FPs to construct a concentrator and a rotator, which is feasible in experimental fabrications. The simulations of total scattering cross sections confirm their functionalities.