Complementary elliptical cloak with arbitrary axial ratio

Abstract

The ability to make object invisibility with a cloak that is fitted to all various shape objects is a long-term aim for investigating optical devices. Invisibility cloak with communication ability illustrated so far generally include a conformal elliptical structure hidden an object that has fixed size, so it is inconvenient for the different shape objects. We therefore seek a non-conformal elliptical complementary cloak with arbitrary axial ratio to solve this issue. The complementary cloak is an elliptical structure composed of three regions, which allows for exchange of information with the outside world without “anti-objects” that is difficult to define.