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Synthetic Anti-PT Symmetry in a Single Microcavity

Year: 2020
Type: article
Abstract: Non-Hermitian systems based on parity-time (PT) and anti-PT symmetry reveal rich physics beyond the Hermitian regime. So far, realizations of such symmetric systems have been limited to the spatial domain. Here we theoretically and experimentally demonstrate synthetic anti-PT symmetry in a spectral dimension induced by nonlinear Brillouin scattering in a single optical microcavity, where Brillouin scattering induced transparency or absorption in two spectral resonances provides the optical gain and loss to observe a phase transition between two symmetry regimes. This scheme provides a new paradigm towards the investigation of non-Hermitian physics in a synthetic photonic dimension for all-optical signal processing and quantum information science.
DOI: 10.1103/physrevlett.124.053901
Institutions: Shanghai Jiao Tong University, State Key Laboratory of Advanced Optical Communication Systems and Networks, State Key Laboratory of Advanced Optical Communication Systems and Networks, The Graduate Center, CUNY, College of Staten Island, City University of New York
Language: English
Open Access status: green
Awards: G1818596878, G3613806500, G4518114676, G5492125140, 光学微腔中光频率梳自锁频技术及低噪微波源基础研究, CAREER: Topology and Symmetry Enabled Phenomena in Lasers and Other Non-Hermitian Photonic Media
OpenAlex ID: W2955035853
FWCI: 10.46
Cites: 65
Cited by: 164
Related to: 10