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Topologically protected elastic waves in phononic metamaterials

Author

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  • S. Hossein Mousavi

    (Microelectronics Research Centre, Electrical and Computer Engineering, Cockrell School of Engineering, University of Texas at Austin)

  • Alexander B. Khanikaev

    (Queens College of The City University of New York
    The Graduate Centre of The City University of New York)

  • Zheng Wang

    (Microelectronics Research Centre, Electrical and Computer Engineering, Cockrell School of Engineering, University of Texas at Austin)

Abstract

Surface waves in topological states of quantum matter exhibit unique protection from backscattering induced by disorders, making them ideal carriers for both classical and quantum information. Topological matters for electrons and photons are largely limited by the range of bulk properties, and the associated performance trade-offs. In contrast, phononic metamaterials provide access to a much wider range of material properties. Here we demonstrate numerically a phononic topological metamaterial in an elastic-wave analogue of the quantum spin Hall effect. A dual-scale phononic crystal slab is used to support two effective spins for phonons over a broad bandwidth, and strong spin–orbit coupling is realized by breaking spatial mirror symmetry. By preserving the spin polarization with an external load or spatial symmetry, phononic edge states are shown to be robust against scattering from discrete defects as well as disorders in the continuum, demonstrating topological protection for phonons in both static and time-dependent regimes.

Suggested Citation

  • S. Hossein Mousavi & Alexander B. Khanikaev & Zheng Wang, 2015. "Topologically protected elastic waves in phononic metamaterials," Nature Communications, Nature, vol. 6(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9682
    DOI: 10.1038/ncomms9682
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    Cited by:

    1. Li, Binsheng & Chen, Hui & Xia, Baizhan & Yao, Lingyun, 2023. "Acoustic energy harvesting based on topological states of multi-resonant phononic crystals," Applied Energy, Elsevier, vol. 341(C).
    2. Hengjiang Ren & Tirth Shah & Hannes Pfeifer & Christian Brendel & Vittorio Peano & Florian Marquardt & Oskar Painter, 2022. "Topological phonon transport in an optomechanical system," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    3. Weitao Yuan & Chenwen Yang & Danmei Zhang & Yang Long & Yongdong Pan & Zheng Zhong & Hong Chen & Jinfeng Zhao & Jie Ren, 2021. "Observation of elastic spin with chiral meta-sources," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    4. Ji-Qian Wang & Zi-Dong Zhang & Si-Yuan Yu & Hao Ge & Kang-Fu Liu & Tao Wu & Xiao-Chen Sun & Le Liu & Hua-Yang Chen & Cheng He & Ming-Hui Lu & Yan-Feng Chen, 2022. "Extended topological valley-locked surface acoustic waves," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    5. Qianlong Kang & Fujia Chen & Hongyong Mao & Keya Zhou & Kai Guo & Shutian Liu & Zhongyi Guo, 2023. "Dual-band valley-protected topological edge states in graphene-like phononic crystals with waveguide," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 96(3), pages 1-7, March.
    6. Lianchao Wang & Julio A. Iglesias Martínez & Gwenn Ulliac & Bing Wang & Vincent Laude & Muamer Kadic, 2023. "Non-reciprocal and non-Newtonian mechanical metamaterials," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    7. Xiaoxiao Wu & Haiyan Fan & Tuo Liu & Zhongming Gu & Ruo-Yang Zhang & Jie Zhu & Xiang Zhang, 2022. "Topological phononics arising from fluid-solid interactions," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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