Experimental demonstration of a free space cylindrical cloak without superluminal propagation
Abstract
We experimentally demonstrated an alternative approach of invisibility cloaking that can combine technical advantages of all current major cloaking strategies in a unified manner and thus can solve bottlenecks of individual strategies. A broadband cylindrical invisibility cloak in free space is designed based on scattering cancellation (the approach of previous plasmonic cloaking), and implemented with anisotropic metamaterials (a fundamental property of singular-transformation cloaks). Particularly, non-superluminal propagation of electromagnetic waves, a superior advantage of non-Euclidian-transformation cloaks constructed with complex branch cuts, is inherited in this design, and thus is the reason of its relatively broad bandwidth. This demonstration provides the possibility for future practical implementation of cloaking devices at large scales in free space.
Keywords
Cite
@article{arxiv.1108.1204,
title = {Experimental demonstration of a free space cylindrical cloak without superluminal propagation},
author = {Su Xu and Xiangxiang Cheng and Sheng Xi and Runren Zhang and Herbert O. Moser and Zhi Shen and Yang Xu and Zhengliang Huang and Xianmin Zhang and Faxin Yu and Baile Zhang and Hongsheng Chen},
journal= {arXiv preprint arXiv:1108.1204},
year = {2015}
}
Comments
16 pages, 3 figures, accepted by Physical Review Letters