Abstract
Reversible optical nonreciprocity was achieved in 1D nonlinear photonic structures by simply tuning the input light intensity. The theoretical model and working mechanism of bidirectional switching were discussed first. The influences of period number, the refractive index of the periodic dielectric medium, and input light intensity on the transmission spectra for the forward and backward directions were systematically investigated. Choosing the appropriate refractive index of the periodic dielectric medium, the threshold input light intensity for reversing unidirectional transmission directions was obtained for the optimum structure. The light-driven bidirectional nonreciprocity transmission of this compact photonic structure has great importance to realize dynamically controllable wave propagating microsystems.
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