Unconventional scattering of flexural waves in a tunable parity-time symmetric shunted piezoelectric beam (Conference Presentation)

Qian Wu; Yangyang Chen; Guoliang Huang

doi:10.1117/12.2558964

24 April 2020 Unconventional scattering of flexural waves in a tunable parity-time symmetric shunted piezoelectric beam (Conference Presentation)

Qian Wu, Yangyang Chen, Guoliang Huang

Author Affiliations +

Proceedings Volume 11381, Health Monitoring of Structural and Biological Systems XIV; 113811I (2020) https://doi.org/10.1117/12.2558964
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only

Abstract

Inspired by the optical and acoustic non-Hermitian 𝒫𝒯 symmetric system, a 𝒫𝒯 symmetric metamaterial beam for flexural waves is proposed here, based on shunted piezoelectric patches. Positive and negative shunting resistances are the key to constructing the balanced loss and gain components. The associated asymmetric flexural wave scattering, 𝒫𝒯 phase transition and exceptional points are then investigated in both analytical and numerical ways. In addition, properties of exceptional points are tunable in our proposed system, simply owing to the variable shunting parameters. Our design may contribute to asymmetric wave control, enhanced sensing, amplification, and localization of flexural waves.

Conference Presentation

Citation Download Citation

Qian Wu, Yangyang Chen, and Guoliang Huang "Unconventional scattering of flexural waves in a tunable parity-time symmetric shunted piezoelectric beam (Conference Presentation)", Proc. SPIE 11381, Health Monitoring of Structural and Biological Systems XIV, 113811I (24 April 2020); https://doi.org/10.1117/12.2558964

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