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Magnetocontrollable high-pass behavior of waveguides with magnetorheological fluids

Published online by Cambridge University Press:  27 August 2013

Xinwei Li
Affiliation:
Department of Physics, State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University, Shanghai 200433, P.R. China
Chunzen Fan
Affiliation:
Department of Physics, State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University, Shanghai 200433, P.R. China School of Physical Science and Engineering, Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou 450052, P.R. China
Jiping Huang*
Affiliation:
Department of Physics, State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University, Shanghai 200433, P.R. China
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Abstract

Tunably controlling waveguide behaviors are always desirable for various kinds of applications. In this work, we theoretically propose the possibility to realize a tunable high-pass waveguide by magnetically controlling magnetorheological fluids inside. Through computer simulations and numerical calculations, we find that the low-pass or high-pass behavior of such waveguides can be manually switched. Furthermore, the cutoff frequency and transmission band of the waveguides can be smoothly controlled by an applied magnetic field. It is revealed that the underlying mechanism lies in the field-induced anisotropic structure of magnetorheological fluids. By combining soft materials, this work shows a way to obtain magnetocontrollable properties of waveguides, which may help to achieve tunable properties for other metamaterial-based devices like invisible cloaks and photonic crystals.

Type
Research Article
Copyright
© EDP Sciences, 2013

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