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Realization of exceptional points along a synthetic orbital angular momentum dimension.
Yang, Mu; Zhang, Hao-Qing; Liao, Yu-Wei; Liu, Zheng-Hao; Zhou, Zheng-Wei; Zhou, Xing-Xiang; Xu, Jin-Shi; Han, Yong-Jian; Li, Chuan-Feng; Guo, Guang-Can.
Afiliación
  • Yang M; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China.
  • Zhang HQ; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China.
  • Liao YW; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China.
  • Liu ZH; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China.
  • Zhou ZW; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China.
  • Zhou XX; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China.
  • Xu JS; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China.
  • Han YJ; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China.
  • Li CF; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China.
  • Guo GC; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China.
Sci Adv ; 9(4): eabp8943, 2023 Jan 25.
Article en En | MEDLINE | ID: mdl-36696496
Exceptional points (EPs), at which more than one eigenvalue and eigenvector coalesce, are unique spectral features of non-Hermiticity (NH) systems. They exist widely in open systems with complex energy spectra. We experimentally demonstrate the appearance of paired EPs in a periodical-driven degenerate optical cavity along the synthetic orbital angular momentum dimension with a tunable parameter. The complex-energy band structures and the key features of EPs, i.e., their bulk Fermi arcs, parity-time symmetry breaking transition, energy swapping, and half-integer band windings, are directly observed by detecting the wavefront angle-resolved transmission spectrum. Our results demonstrate the flexibility of using the photonic synthetic dimensions to implement NH systems beyond their geometric dimension and EP-based sensing.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Adv Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Adv Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos