12 September 2011 Optical diodes in nonlinear structures with parity-time symmetries
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We show that nonlinear optical structures involving a balanced gain-loss profile can act as optical diodes. This is made possible by exploiting the interplay between the fundamental symmetries of parity (P) and time (T), with optical nonlinear Kerr effects. This unidirectional propagation is demonstrated for the case of a PT -symmetric nonlinear coupler and a PT-symmetric Bragg grating.
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Hamidreza Ramezani, Hamidreza Ramezani, Zin Lin, Zin Lin, Tsampikos Kottos, Tsampikos Kottos, Demetrios N. Christodoulides, Demetrios N. Christodoulides, } "Optical diodes in nonlinear structures with parity-time symmetries", Proc. SPIE 8095, Active Photonic Materials IV, 80950L (12 September 2011); doi: 10.1117/12.893195; https://doi.org/10.1117/12.893195

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