Simultaneous Observation of a Topological Edge State and Exceptional Point in an Open and Non-Hermitian Acoustic System
This Letter reports on the experimental observation of a topologically protected edge state and exceptional point in an open and non-Hermitian (lossy) acoustic system. Although the theoretical underpinning is generic to wave physics, the simulations and experiments are performed for an acoustic syst...
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| Published in | Physical review letters Vol. 121; no. 12; p. 124501 |
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| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
21.09.2018
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| Online Access | Get more information |
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| Abstract | This Letter reports on the experimental observation of a topologically protected edge state and exceptional point in an open and non-Hermitian (lossy) acoustic system. Although the theoretical underpinning is generic to wave physics, the simulations and experiments are performed for an acoustic system. It has nontrivial topological properties that can be characterized by the Chern number provided that a synthetic dimension is introduced. Unidirectional reflectionless propagation, a hallmark of exceptional points, is unambiguously observed in both simulations and experiments. |
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| AbstractList | This Letter reports on the experimental observation of a topologically protected edge state and exceptional point in an open and non-Hermitian (lossy) acoustic system. Although the theoretical underpinning is generic to wave physics, the simulations and experiments are performed for an acoustic system. It has nontrivial topological properties that can be characterized by the Chern number provided that a synthetic dimension is introduced. Unidirectional reflectionless propagation, a hallmark of exceptional points, is unambiguously observed in both simulations and experiments. |
| Author | Li, Dongting Fang, Xinsheng Sun, Yong Jing, Yun Chen, Hong Li, Yong Zhu, Weiwei |
| Author_xml | – sequence: 1 givenname: Weiwei surname: Zhu fullname: Zhu, Weiwei organization: Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China – sequence: 2 givenname: Xinsheng surname: Fang fullname: Fang, Xinsheng organization: Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China – sequence: 3 givenname: Dongting surname: Li fullname: Li, Dongting organization: Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China – sequence: 4 givenname: Yong surname: Sun fullname: Sun, Yong organization: Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China – sequence: 5 givenname: Yong surname: Li fullname: Li, Yong organization: Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China – sequence: 6 givenname: Yun surname: Jing fullname: Jing, Yun organization: Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA – sequence: 7 givenname: Hong surname: Chen fullname: Chen, Hong organization: Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/30296128$$D View this record in MEDLINE/PubMed |
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