Observation of parity–time symmetry in optics
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...Another direction of non-Hermitian topological photonics is parity-time (PT ) symmetric (Makris et al., 2008; Rüter et al., 2010) topological systems....
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2,061 citations
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...PT symmetry has been studied both experimentally [4-12] and theoretically [13-23] in a variety of physical systems, with experiments performed on electronic circuits [4], nuclear magnetic resonance [5], optics [6-8], metamaterials [9], microwave cavities [10], mechanical oscillators [11], and superconductors [12]....
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...Previous PT-symmetric optics experiments [6,7] used coupled waveguides in which the resonances play no role....
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"Observation of parity–time symmetry..." refers background in this paper
...The left (right) panel shows the situation when light is coupled into channel 1 (2)....
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"Observation of parity–time symmetry..." refers background in this paper
...In particular, this is true for an asymmetric loss/loss-type potential (coupled states with low/high losses), showing a ‘passive’ P T syste...
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