An invisibility cloak using silver nanowires

TL;DR

This paper presents a design for an invisibility cloak using silver nanowires with elliptical cross-sections, employing an effective medium approach and parameter retrieval, resulting in a simpler, robust, and manufacturable cloaking device.

Contribution

It introduces a novel simplified cloak design based on silver nanowires and an empirical effective medium approach, improving manufacturability and robustness over previous designs.

Findings

Numerical simulations confirm robustness against hidden objects and incoming waves.

The cloak design is simpler and easier to manufacture than earlier proposals.

The method combines parameter retrieval with an analytical effective medium approach.

Abstract

In this paper, we use the parameter retrieval method together with an analytical effective medium approach to design a well-performed invisible cloak, which is based on an empirical revised version of the reduced cloak. The designed cloak can be implemented by silver nanowires with elliptical cross-sections embedded in a polymethyl methacrylate host. This cloak is numerically proved to be robust for both the inner hidden object as well as incoming detecting waves, and is much simpler thus easier to manufacture when compared with the earlier proposed one [Nat. Photon. 1, 224 (2007)].