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Nonlinear optics

Asymmetry from symmetry

An unusual form of symmetry breaking in coupled microresonators with balanced optical gain and loss is now exploited to realize a novel type of optical isolator.

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Figure 1: A nonlinear optical isolator based on parity–time symmetry.

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Correspondence to Chong Yidong.

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Yidong, C. Asymmetry from symmetry. Nature Phys 10, 336–337 (2014). https://doi.org/10.1038/nphys2941

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