Non‐Hermitian Topological Phononic Metamaterials

Author:

Lu Jiuyang1,Deng Weiyin1,Huang Xueqin2,Ke Manzhu1,Liu Zhengyou13ORCID

Affiliation:

1. Key Laboratory of Artificial Micro‐ and Nanostructures of Ministry of Education and School of Physics and Technology Wuhan University Wuhan 430072 China

2. School of Physics and Optoelectronics South China University of Technology Guangzhou Guangdong 510640 China

3. Institute for Advanced Studies Wuhan University Wuhan 430072 China

Abstract

AbstractNon‐Hermitian (NH) physics describes novel phenomena in open systems that allow generally complex spectra. Introducing NH physics into topological metamaterials, which permits explorations of topological wave phenomena in artificially designed structures, not only enables the experimental verification of exotic NH phenomena in these flexible platforms, but also enriches the manipulation of wave propagation beyond the Hermitian cases. Here, a perspective on the advances in the research of NH topological phononic metamaterials is presented, which covers the exceptional points and their topological geometries, the skin effect related to the topology of complex spectra, the interplay of NH effects and topological states in phononic metamaterials, etc.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

Publisher

Wiley

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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