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30 April 2019 Switching in the PT-symmetric nonlinear periodic structures
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Abstract
We study the dynamic behavior and switching of optical pulses in the PT - symmetric structure with the additional periodic modulation of the Kerr nonlinearity. In such structure the change of a refractive index by an intense optical radiation causes the change of the PT - symmetry breaking threshold while the gain/loss value is constant. As the result the system can move from the full PT - symmetry state to the broken PT - symmetry or vice versa. It is shown that despite the self-pulsation instability these transitions can be observed in the switching of long enough optical pulses. Furthermore, such active structures allow to control the amplitude enhancement of the transmitted pulses.
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Pavel Yu. Shestakov, Vladimir F. Marchenko, and Maria V. Komissarova "Switching in the PT-symmetric nonlinear periodic structures", Proc. SPIE 11026, Nonlinear Optics and Applications XI, 110260A (30 April 2019); https://doi.org/10.1117/12.2520691
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