Magnetic Fano resonances by design in symmetry broken THz meta-foils

Jianfeng Wu; Herbert O Moser; Rujiang Li; Yihao Yang; Liqiao Jing; Hongsheng Chen; Mark B H Breese

doi:10.1038/srep41869

Magnetic Fano resonances by design in symmetry broken THz meta-foils

Sci Rep. 2017 Feb 2:7:41869. doi: 10.1038/srep41869.

Authors

Jianfeng Wu^{1

2}, Herbert O Moser³, Rujiang Li^{4

5

6}, Yihao Yang^{4

5

6}, Liqiao Jing^{4

5

6}, Hongsheng Chen^{4

5

6}, Mark B H Breese⁷

Affiliations

¹ Department of Physics, National University of Singapore, 2 Science Drive 3, 117542 Singapore.
² Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117576 Singapore.
³ Karlsruhe Institute of Technology (KIT), Institute of Microstructure Technology (IMT), Postfach 3640, 76021 Karlsruhe, Germany.
⁴ State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China.
⁵ The Innovative Institute of Electromagnetic Information and Electronic Integration, College of Information Science &Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
⁶ The Electromagnetics Academy at Zhejiang University, Zhejiang University, Hangzhou 310027, China.
⁷ Singapore Synchrotron Light Source (SSLS), National University of Singapore, 5 Research Link, 117603 Singapore.

Abstract

Magnetic Fano resonances in there-dimensional symmetry broken meta-foils at THz frequencies are theoretically and experimentally studied. Sharp Fano resonances occur due to the interference between different resonances and can be designed by choosing geometric parameters of the meta-foil. At the Fano resonances, the meta-foil supports antisymmetric modes, whereas, at the main resonance, only a symmetric mode exists. The meta-foil is left-handed at the Fano resonances and shows sharp peaks of the real part of the refractive index in transmission with small effective losses opening a way to very sensitive high-speed sensing of dielectric changes in the surrounding media and of mechanical configuration.

Publication types

Research Support, Non-U.S. Gov't