title: Shaping 3D Path of Electromagnetic Waves Using Gradient-Refractive-Index Metamaterials.
abstract: An all-dielectric semispherical lenswith functions in shaping 3D wave-propagation paths is proposed and experimentally verified. When radiation sources are placed in the central region, the lens behaves as a magnifying device to resolve the sources in subwavelength scale; while when the electromagnetic waves impinge on the semispherical lens from outside, they will be guided spirally inward.
authors.affiliation: State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 P.R. China; Synergetic Innovation Center of Wireless Communication Technology Nanjing 210096 P.R. China.
authors.forename: Wei Xiang
authors.initials: WX
authors.lastname: Jiang
authors.affiliation: State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 P.R. China.
authors.forename: Shuo
authors.initials: S
authors.lastname: Ge
authors.affiliation: School of Physical Science and Technology Southwest University Chongqing 400715 P.R. China; Department of Electrical and Computer Engineering National University of Singapore Singapore 119620 Singapore.
authors.forename: Tiancheng
authors.initials: T
authors.lastname: Han
authors.affiliation: School of Physics and Astronomy University of Birmingham Edgbaston Birmingham B15 2TT UK.
authors.forename: Shuang
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Department of Electrical and Computer Engineering National University of Singapore Singapore 119620 Singapore.
authors.forename: Muhammad Qasim
authors.initials: MQ
authors.lastname: Mehmood
authors.affiliation: Department of Electrical and Computer Engineering National University of Singapore Singapore 119620 Singapore.
authors.forename: Cheng-Wei
authors.initials: CW
authors.lastname: Qiu
authors.affiliation: State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 P.R. China; Cooperative Innovation Centre of Terahertz Science No. 4, North Jianshe Road Chengdu 610054 P.R. China.
authors.forename: Tie Jun
authors.initials: TJ
authors.lastname: Cui
keywords: high‐resolution imaging; matched solid immersion lens; metamaterial; path shaping; transformation optics