Parity-time symmetric acoustic system constructed by piezoelectric composite plates with active external circuits

doi:10.1088/1674-1056/ac4e10

中国物理B ›› 2022, Vol. 31 ›› Issue (6): 64304-064304.doi: 10.1088/1674-1056/ac4e10

Parity-time symmetric acoustic system constructed by piezoelectric composite plates with active external circuits

Yang Zhou(周扬)¹, Zhang-Zhao Yang(杨彰昭)¹, Yao-Yin Peng(彭尧吟)¹, and Xin-Ye Zou(邹欣晔)^1,2,†

1 Key Laboratory of Modern Acoustics, MOE, Institute of Acoustics, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China;
2 State Key Laboratory of Acoustics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2021-12-05 修回日期:2021-12-31 接受日期:2022-01-24 出版日期:2022-05-17 发布日期:2022-05-19
通讯作者: Xin-Ye Zou E-mail:xyzou@nju.edu.cn
基金资助:
Project supported by the National Key R&D Program of China (Grant No. 2017YFA0303700), the National Natural Science Foundation of China (Grant Nos. 11634006, 11934009, and 12074184), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20191245), and the State Key Laboratory of Acoustics, Chinese Academy of Sciences.

Parity-time symmetric acoustic system constructed by piezoelectric composite plates with active external circuits

Yang Zhou(周扬)¹, Zhang-Zhao Yang(杨彰昭)¹, Yao-Yin Peng(彭尧吟)¹, and Xin-Ye Zou(邹欣晔)^1,2,†

1 Key Laboratory of Modern Acoustics, MOE, Institute of Acoustics, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China;
2 State Key Laboratory of Acoustics, Chinese Academy of Sciences, Beijing 100190, China

Received:2021-12-05 Revised:2021-12-31 Accepted:2022-01-24 Online:2022-05-17 Published:2022-05-19
Contact: Xin-Ye Zou E-mail:xyzou@nju.edu.cn
Supported by:
Project supported by the National Key R&D Program of China (Grant No. 2017YFA0303700), the National Natural Science Foundation of China (Grant Nos. 11634006, 11934009, and 12074184), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20191245), and the State Key Laboratory of Acoustics, Chinese Academy of Sciences.

摘要/Abstract

摘要： Researches on parity-time (PT) symmetry in acoustic field can provide an efficient platform for controlling the travelling acoustic waves with balanced loss and gain. Here, we report a feasible design of PT-symmetric system constructed by piezoelectric composite plates with two different active external circuits. By judiciously adjusting the resistances and inductances in the external circuits, we obtain the exceptional point due to the spontaneous breaking of PT symmetry at the desired frequencies and can observe the unidirectional invisibility. Moreover, the system can be at PT exact phase or broken phase at the same frequency in the same structure by merely adjusting the external circuits, which represents the active control that makes the acoustic manipulation more convenient. Our study may provide a feasible way for manipulating acoustic waves and inspire the application of piezoelectric composite materials in acoustic structures.

关键词: parity-time symmetry, acoustic gain material, piezoelectric composite plate, exceptional point

Abstract: Researches on parity-time (PT) symmetry in acoustic field can provide an efficient platform for controlling the travelling acoustic waves with balanced loss and gain. Here, we report a feasible design of PT-symmetric system constructed by piezoelectric composite plates with two different active external circuits. By judiciously adjusting the resistances and inductances in the external circuits, we obtain the exceptional point due to the spontaneous breaking of PT symmetry at the desired frequencies and can observe the unidirectional invisibility. Moreover, the system can be at PT exact phase or broken phase at the same frequency in the same structure by merely adjusting the external circuits, which represents the active control that makes the acoustic manipulation more convenient. Our study may provide a feasible way for manipulating acoustic waves and inspire the application of piezoelectric composite materials in acoustic structures.

Key words: parity-time symmetry, acoustic gain material, piezoelectric composite plate, exceptional point

中图分类号: (Structural acoustics and vibration)

43.40.+s

43.38.Ew (Feedback transducers) 43.40.Yq (Instrumentation and techniques for tests and measurement relating to shock and vibration, including vibration pickups, indicators, and generators, mechanical impedance)

Yang Zhou(周扬), Zhang-Zhao Yang(杨彰昭), Yao-Yin Peng(彭尧吟), and Xin-Ye Zou(邹欣晔). Parity-time symmetric acoustic system constructed by piezoelectric composite plates with active external circuits[J]. 中国物理B, 2022, 31(6): 64304-064304.

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Parity-time symmetric acoustic system constructed by piezoelectric composite plates with active external circuits

Parity-time symmetric acoustic system constructed by piezoelectric composite plates with active external circuits

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