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Propagation of dark solitons in parity-time symmetric waveguides
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NSTL
Elsevier
We study the propagation of dark solitons in the Kerr nonlinearity and parity-time (PT )-symmetric waveguides with Gaussian distribution. Fundamental characters of the dark solitons during the transportation are carefully checked in different parameter regions by the split-time-step Crank-Nicolson method. The results show that the dark solitons are bound to the center of the PT-symmetric waveguide when the central refractive index of the PT-symmetric potential is strong, and the dark soliton tends to deflect toward the gain region due to the gain/loss effect of PT-symmetric waveguide. We also find that when the dark soliton is introduced from the gain region of the PT-symmetric potential , the low-speed dark soliton is reflected by the gain region, and the high-speed dark soliton is bound to the center of the PT-symmetric potential in the corresponding parameter interval.
Dark solitonParity-time symmetryPropagat i o n of solitonOPTICAL SOLITONSBRIGHT SOLITONS
NSTL
Elsevier
