奇异介质实现深亚波长分辨率。
Realization of deep subwavelength resolution with singular media.
机构信息
1] The Electromagnetics Academy at Zhejiang University, Zhejiang University, Hangzhou 310027, China [2] State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China [3] Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore [4] Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637371, Singapore.
1] The Electromagnetics Academy at Zhejiang University, Zhejiang University, Hangzhou 310027, China [2] State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China.
出版信息
Sci Rep. 2014 Jun 9;4:5212. doi: 10.1038/srep05212.
The record of imaging resolution has kept being refreshed in the past decades and the best resolution of hyperlenses and superlenses so far is about one out of tens in terms of wavelength. In this paper, by adopting a hybrid concept of transformation optics and singular media, we report a broadband meta-lens design methodology with ultra-high resolution. The meta-lens is made of subwavelength metal/air layers, which exhibit singular medium property over a broad band. As a proof of concept, the subwavelength imaging ability is demonstrated over a broad frequency band from 1.5-10 GHz with the resolution varying from 1/117 to 1/17 wavelength experimentally.
在过去的几十年中，成像分辨率的记录不断刷新，超透镜和超材料的最佳分辨率迄今为止约为十分之一的波长。在本文中，我们采用变换光学和奇异介质的混合概念，报道了一种具有超高分辨率的宽带超透镜设计方法。该超透镜由亚波长金属/空气层组成，在宽带内表现出奇异介质特性。作为概念验证，实验证明了在 1.5-10GHz 的宽频带内具有亚波长成像能力，分辨率从 1/117 到 1/17 波长变化。
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