Soliton dynamics in a PT-symmetric optical lattice with a longitudinal potential barrier Article Swipe

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Keya Zhou , Tingting Wei , Hai-Peng Sun , Yingji He , Shutian Liu ·

YOU? · · 2015 · Open Access · · DOI: https://doi.org/10.1364/oe.23.016903 · OA: W579425715

We present dynamics of spatial solitons propagating through a PT symmetric optical lattice with a longitudinal potential barrier. We find that a spatial soliton evolves a transverse drift motion after transmitting through the lattice barrier. The gain/loss coefficient of the PT symmetric potential barrier plays an essential role on such soliton dynamics. The bending angle of solitons depends on the lattice parameters including the modulation frequency, incident position, potential depth and the barrier length. Besides, solitons tend to gain a certain amount of energy from the barrier, which can also be tuned by barrier parameters.