title: Realization of deep subwavelength resolution with singular media.
abstract: 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.
authors.affiliation: 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.
authors.forename: Su
authors.initials: S
authors.lastname: Xu
authors.affiliation: 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.
authors.forename: Yuyu
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: 1] Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore [2] Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637371, Singapore.
authors.forename: Hongyi
authors.initials: H
authors.lastname: Xu
authors.affiliation: 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.
authors.forename: Junxia
authors.initials: J
authors.lastname: Wang
authors.affiliation: 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.
authors.forename: Shisheng
authors.initials: S
authors.lastname: Lin
authors.affiliation: 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.
authors.forename: Hongsheng
authors.initials: H
authors.lastname: Chen
authors.affiliation: 1] Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore [2] Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637371, Singapore.
authors.forename: Baile
authors.initials: B
authors.lastname: Zhang