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Simulation of electromagnetically induced transparency like acoustic transmission assisted by PT-symmetry

Published online by Cambridge University Press:  20 March 2013

Jin Han ,
Yuancheng Fan ,
Liang Jin ,
Zhengren Zhang ,
Zeyong Wei ,
Chao Wu ,
Hongqiang Li ,
Hong Chen  and
Zhanshan Wang
Jin Han
Affiliation:
Department of Physics, Key Laboratory of Advanced Micro-structure Materials (MOE), Tongji University, Shanghai 200092, P.R. China
Yuancheng Fan
Affiliation:
Department of Physics, Key Laboratory of Advanced Micro-structure Materials (MOE), Tongji University, Shanghai 200092, P.R. China
Liang Jin
Affiliation:
Department of Physics, Key Laboratory of Advanced Micro-structure Materials (MOE), Tongji University, Shanghai 200092, P.R. China
Zhengren Zhang
Affiliation:
Department of Physics, Key Laboratory of Advanced Micro-structure Materials (MOE), Tongji University, Shanghai 200092, P.R. China
Zeyong Wei
Affiliation:
Department of Physics, Key Laboratory of Advanced Micro-structure Materials (MOE), Tongji University, Shanghai 200092, P.R. China
Chao Wu
Affiliation:
Department of Physics, Key Laboratory of Advanced Micro-structure Materials (MOE), Tongji University, Shanghai 200092, P.R. China
Hongqiang Li*
Affiliation:
Department of Physics, Key Laboratory of Advanced Micro-structure Materials (MOE), Tongji University, Shanghai 200092, P.R. China
Hong Chen
Affiliation:
Department of Physics, Key Laboratory of Advanced Micro-structure Materials (MOE), Tongji University, Shanghai 200092, P.R. China
Zhanshan Wang
Affiliation:
Department of Physics, Key Laboratory of Advanced Micro-structure Materials (MOE), Tongji University, Shanghai 200092, P.R. China
*
ae-mail: hqlee@tongji.edu.cn
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Abstract

Since the pioneer work by Bender and Boettcher on non-Hermitian Hamiltonian under paritytime (PT) symmetry [Phys. Rev. Lett. 80, 5243 (1998)], PT-symmetry optical coupled systems have been investigated extensively. Here we propose theoretically perfect transparency of a PT-symmetric acoustic coupled system which is comprised of a waveguide channel and two same-sized side-coupled resonators. Specifically, we demonstrate that with the change in the amplitude of attenuation and amplification coefficient, the spatial symmetry of two resonators is spontaneously broken which triggers an acoustic analog of electromagnetically induced transparency (EIT) by assigning anti-phase to the pressure field inside the two resonators.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 62 , Issue 1 , April 2013 , 11301
Copyright
© EDP Sciences, 2013

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