中国物理B ›› 2023, Vol. 32 ›› Issue (3): 34303-034303.doi: 10.1088/1674-1056/ac8727

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Tunable topological interface states and resonance states of surface waves based on the shape memory alloy

Shao-Yong Huo(霍绍勇)1, Long-Chao Yao(姚龙超)1, Kuan-Hong Hsieh(谢冠宏)2, Chun-Ming Fu(符纯明)1,†, Shih-Chia Chiu(邱士嘉)2,‡, Xiao-Chao Gong(龚小超)2, and Jian Deng(邓健)1   

  1. 1 College of Mechanical Engineering, University of South China, Hengyang 421001, China;
    2 1MORE INC, Shenzhen 518000, China
  • 收稿日期:2022-05-10 修回日期:2022-07-10 接受日期:2022-08-05 出版日期:2023-02-14 发布日期:2023-02-21
  • 通讯作者: Chun-Ming Fu, Shih-Chia Chiu E-mail:fuchunming@hnu.edu.cn;gary.sc.qiu@tiinlab.com
  • 基金资助:
    Project supported from the Doctoral Research Fund of University of South China (Grant No. 210XQD016) and the Outstanding Youth Foundation of the Hunan Education Department (Grant No. 21B0406).

Tunable topological interface states and resonance states of surface waves based on the shape memory alloy

Shao-Yong Huo(霍绍勇)1, Long-Chao Yao(姚龙超)1, Kuan-Hong Hsieh(谢冠宏)2, Chun-Ming Fu(符纯明)1,†, Shih-Chia Chiu(邱士嘉)2,‡, Xiao-Chao Gong(龚小超)2, and Jian Deng(邓健)1   

  1. 1 College of Mechanical Engineering, University of South China, Hengyang 421001, China;
    2 1MORE INC, Shenzhen 518000, China
  • Received:2022-05-10 Revised:2022-07-10 Accepted:2022-08-05 Online:2023-02-14 Published:2023-02-21
  • Contact: Chun-Ming Fu, Shih-Chia Chiu E-mail:fuchunming@hnu.edu.cn;gary.sc.qiu@tiinlab.com
  • Supported by:
    Project supported from the Doctoral Research Fund of University of South China (Grant No. 210XQD016) and the Outstanding Youth Foundation of the Hunan Education Department (Grant No. 21B0406).

摘要: Topological interface state (TIS) of elastic wave has attracted significant research interest due to its potential prospects in strengthening acoustic energy and enhancing the signal accuracy of damage identification and quantification. However, previous implementations on the interface modes of surface waves are limited to the non-adjustable frequency band and unalterable mode width. Here, we demonstrate the tunable TIS and topological resonance state (TRS) of Rayleigh wave by using a shape memory alloy (SMA) stubbed semi-infinite one-dimensional (1D) solid phononic crystals (PnCs), which simultaneously possesses the adjustable mode width. The mechanism of tunability stems from the phase transformation of the SMA between the martensite at low temperature and the austenite at high temperature. The tunable TIS of Rayleigh wave is realized by combining two bandgap-opened PnCs with different Zak phases. The TRS with adjustable mode width is achieved in the heterostructures by adding PnCs with Dirac point to the middle of two bandgap-opened PnCs with different Zak phases, which exhibits the extraordinary robustness in contrast to the ordinary Fabry-Pérot resonance state. This research provides new possibilities for the highly adjustable Rayleigh wave manipulation and find promising applications such as tunable energy harvesters, wide-mode filters, and high-sensitivity Rayleigh wave detectors.

关键词: tunable topological interface state, Rayleigh wave, alterable mode width, topological phononic crystals, shape memory alloys

Abstract: Topological interface state (TIS) of elastic wave has attracted significant research interest due to its potential prospects in strengthening acoustic energy and enhancing the signal accuracy of damage identification and quantification. However, previous implementations on the interface modes of surface waves are limited to the non-adjustable frequency band and unalterable mode width. Here, we demonstrate the tunable TIS and topological resonance state (TRS) of Rayleigh wave by using a shape memory alloy (SMA) stubbed semi-infinite one-dimensional (1D) solid phononic crystals (PnCs), which simultaneously possesses the adjustable mode width. The mechanism of tunability stems from the phase transformation of the SMA between the martensite at low temperature and the austenite at high temperature. The tunable TIS of Rayleigh wave is realized by combining two bandgap-opened PnCs with different Zak phases. The TRS with adjustable mode width is achieved in the heterostructures by adding PnCs with Dirac point to the middle of two bandgap-opened PnCs with different Zak phases, which exhibits the extraordinary robustness in contrast to the ordinary Fabry-Pérot resonance state. This research provides new possibilities for the highly adjustable Rayleigh wave manipulation and find promising applications such as tunable energy harvesters, wide-mode filters, and high-sensitivity Rayleigh wave detectors.

Key words: tunable topological interface state, Rayleigh wave, alterable mode width, topological phononic crystals, shape memory alloys

中图分类号:  (Architectural acoustics)

  • 43.55.+p
43.90.+v (Other topics in acoustics) 02.40.Pc (General topology) 46.40.-f (Vibrations and mechanical waves)