Experimental realization of subwavelength flux manipulation in anisotropic near-zero index metamaterials
1 MOE Key Laboratory of Advanced Micro-Structured Materials, School of Physics Science and Engineering, Tongji University - Shanghai, 200092, China
2 College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University - Suzhou 215006, China
Received: 7 December 2015
Accepted: 14 March 2016
Recently, it has been theoretically shown that anisotropic metamaterials with a near-zero index can flexibly control electromagnetic flux in the subwavelength scale. Here, by using two-dimensional transmission lines with lumped elements, we design and fabricate a type of anisotropic metamaterial with a near-zero permeability component. By further introducing spatial variations into the system, we experimentally realize the subwavelength flux manipulation in such a highly anisotropic environment, which is conducted via evanescent scattered waves. The experimental results agree well with the simulation. Our work verifies the feasibility of subwavelength flux manipulation in near-zero index materials.
PACS: 78.67.Pt – Multilayers; superlattices; photonic structures; metamaterials / 42.25.Bs – Wave propagation, transmission and absorption / 52.25.Os – Emission, absorption, and scattering of electromagnetic radiation
© EPLA, 2016