Conformal cloaks from a function composition
1 College of Physics, Optoelectronics and Energy Soochow University - No. 1 Shizi Street, Suzhou 215006, China
2 Institute of Electromagnetics and Acoustics and Department of Electronic Science, Xiamen University Xiamen 361005, China
Received: 19 December 2016
Accepted: 15 March 2017
Since the beginning of transformation optics, invisibility cloaks have been attracting lots of attention, most of which however are usually too complex to realize. Here we propose a conformal cloak by using two mappings in a function composition. The required isotropic refractive index distribution is optimized to a range from 0 to 7.55, which is more feasible than previous designs. Numerical calculations have been performed to verify the cloaking effect.
PACS: 42.25.Fx – Diffraction and scattering / 78.67.Pt – Multilayers; superlattices; photonic structures; metamaterials / 41.20.Jb – Electromagnetic wave propagation; radiowave propagation
© EPLA, 2017