title: An electromagnetic modulator based on electrically controllable metamaterial analogue to electromagnetically induced transparency.
abstract: Electromagnetically induced transparency (EIT) is a promising technology for the enhancement of light-matter interactions, and recent demonstrations of the EIT analogue realized in artificial micro-structured medium have remarkably reduced the extreme requirement for experimental observation of EIT spectrum. In this paper, we propose to electrically control the EIT-like spectrum in a metamaterial as an electromagnetic modulator. A diode acting as a tunable resistor is loaded in the gap of paired wires to inductively tune the magnetic resonance, which induces remarkable modulation on the EIT-like spectrum through the metamaterial sample. The experimental measurements confirmed that the prediction of electromagnetic modulation in three narrow bands on the EIT-like spectrum, and a modulation contrast of up to 31 dB was achieved on the transmission through the metamaterial. Our results may facilitate the study on active/dynamical technology in translational metamaterials, which connect extraordinary manipulations on the flow of light in metamaterials, e.g., the exotic EIT, and practical applications in industry.
authors.affiliation: Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education and Department of Applied Physics, School of Science, Northwestern Polytechnical University, Xi'an 710129, China.
authors.forename: Yuancheng
authors.initials: Y
authors.lastname: Fan
authors.affiliation: Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education and Department of Applied Physics, School of Science, Northwestern Polytechnical University, Xi'an 710129, China.
authors.forename: Tong
authors.initials: T
authors.lastname: Qiao
authors.affiliation: Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education and Department of Applied Physics, School of Science, Northwestern Polytechnical University, Xi'an 710129, China.
authors.forename: Fuli
authors.initials: F
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education and Department of Applied Physics, School of Science, Northwestern Polytechnical University, Xi'an 710129, China.
authors.forename: Quanhong
authors.initials: Q
authors.lastname: Fu
authors.affiliation: Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education and Department of Applied Physics, School of Science, Northwestern Polytechnical University, Xi'an 710129, China.
authors.forename: Jiajia
authors.initials: J
authors.lastname: Dong
authors.affiliation: Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education and Department of Applied Physics, School of Science, Northwestern Polytechnical University, Xi'an 710129, China.
authors.forename: Botao
authors.initials: B
authors.lastname: Kong
authors.affiliation: The Institute of Dongguan-Tongji University, Dongguan 523808, Guangdong, China.
authors.forename: Hongqiang
authors.initials: H
authors.lastname: Li