Publication details

Perfect conformal invisible device with feasible refractive indexes

Investor logo

XU Lin CHEN Huanyang TYC Tomáš XIE Yangbo CUMMER S A

Year of publication 2016
Type Article in Periodical
Magazine / Source Physical Review B
MU Faculty or unit

Faculty of Science

Field Optics, masers and lasers
Keywords invisible cloak; transformation optics; Riemann sheets
Description Optical conformal mapping has been used to construct several isotropic devices with novel functionalities. In particular, a conformal cloak could confer omnidirectional invisibility. However, the maximum values of the refractive indexes needed for current designs are too large to implement, even in microwave experiments. Furthermore, most devices designed so far have had imperfect impedance matching and therefore incomplete invisibility functionalities. Here we describe a perfect conformal invisible device with full impedance matching everywhere. The maximum value of refractive index required by our device is just about five, which is feasible for microwave and terahertz experiments using current metamaterial techniques. To construct the device, we use a logarithmic conformal mapping and a Mikaelian lens. Our results should enable a conformal invisible device with almost perfect invisibility to be made soon.
Related projects:

You are running an old browser version. We recommend updating your browser to its latest version.

More info