Asymmetric soliton mobility in competing linear-nonlinear parity-time-symmetric lattices
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We address the transverse mobility of spatial solitons in competing parity-time-symmetric linear and nonlinear lattices. The competition between out-of-phase linear and nonlinear lattices results in a drastic mobility enhancement within a range of soliton energies. We show that within such a range, the addition of even a small imaginary part in the linear potential makes soliton mobility strongly asymmetric. For a given initial phase tilt, the velocity of soliton motion grows with an increase of the balanced gain/losses. In this regime of enhanced mobility, tilted solitons can efficiently drag other solitons that were initially at rest to form moving soliton pairs.
CitationKartashov, Y.V., Vysloukh, V.A., Torner, L. Asymmetric soliton mobility in competing linear-nonlinear parity-time-symmetric lattices. "Optics letters", 15 Setembre 2016, vol. 41, núm. 18, p. 4348-4351.
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