One-dimensional PT-symmetric acoustic heterostructure

张海啸; 熊威; 程营; 刘晓峻

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One-dimensional PT-symmetric acoustic heterostructure

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摘要

The explorations of parity-time(PT)-symmetric acoustics have resided at the frontier in physics,and the pre-existing accessing of exceptional points typically depends on Fabry-Perot resonances of the coupling interlayer sandwiched between balanced gain and loss components.Nevertheless,the concise PT-symmetric acoustic heterostructure,eliminating extra interactions caused by the interlayer,has not been researched in depth.Here we derive the generalized unitary relation for one-dimensional(1D)PT-symmetric heterostructure of arbitrary complexity,and demonstrate four disparate patterns of anisotropic transmission resonances(ATRs)accompanied by corresponding spontaneous phase transitions.As a special case of ATR,the occasional bidirectional transmission resonance reconsolidates the ATR frequencies that split when waves incident from opposite directions,whose spatial profiles distinguish from a unitary structure.The derived theoretical relation can serve as a predominant signature for the presence of PT symmetry and PT-symmetry-breaking transition,which may provide substantial support for the development of prototype devices with asymmetric acoustic responses.

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来源
《中国物理：英文版》 |2022年第12期|289-294|共6页
作者
张海啸; 熊威; 程营; 刘晓峻;
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作者单位

Department of Physics;

MOE Key Laboratory of Modern Acoustics;

Collaborative Innovation Center of Advanced Microstructures;

Nanjing University;

Nanjing 210093;

China;

School of Electrical and Information Engineering;

Changzhou Institute of Technology;

Changzhou 213032;

China;

State Key Laboratory of Acoustics;

Institute of Acoustics;

Chinese Academy of Sciences;

Beijing 100190;

China;

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原文格式 PDF
正文语种 chi
中图分类量子力学（波动力学、矩阵力学）;
关键词
acoustic PT-symmetric heterostructure; anisotropic transmission resonance; occasional bidirectional transmission resonance;

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One-dimensional PT-symmetric acoustic heterostructure

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