Broadband polygonal invisibility cloak for visible light.
Broadband polygonal invisibility cloak for visible light.
复制标题
可见光的宽带多边形隐形斗篷。
DOI:
10.1038/srep00255
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发表时间:
2012
影响因子:
4.6
通讯作者:
Zheng, Bin
中科院分区:
文献类型:
--
作者:
Chen, Hongsheng;Zheng, Bin
Invisibility cloaks have recently become a topic of considerable interest thanks to the theoretical works of transformation optics and conformal mapping. The design of the cloak involves extreme values of material properties and spatially dependent parameter tensors, which are very difficult to implement. The realization of an isolated invisibility cloak in the visible light, which is an important step towards achieving a fully movable invisibility cloak, has remained elusive. Here, we report the design and experimental demonstration of an isolated polygonal cloak for visible light. The cloak is made of several elements, whose electromagnetic parameters are designed by a linear homogeneous transformation method. Theoretical analysis shows the proposed cloak can be rendered invisible to the rays incident from all the directions. Using natural anisotropic materials, a simplified hexagonal cloak which works for six incident directions is fabricated for experimental demonstration. The performance is validated in a broadband visible spectrum.
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