Open AccessLattice surface solitons in diffusive nonlinear media driven by the quadratic electro-optic effect
Author(s) -
Ke Zhan,
Chunfeng Hou
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.011646
Subject(s) - physics , nonlinear system , quadratic equation , optics , lattice (music) , condensed matter physics , nonlinear optics , surface (topology) , band gap , quantum mechanics , mathematics , geometry , acoustics
We study theoretically surface lattice solitons driven by quadratic electro-optic effect at the interface between an optical lattice and diffusive nonlinear media with self-focusing and self-defocusing saturable nonlinearity. Surface solitons originating from self-focusing nonlinearity can be formed in the semi-infinite gap, and are stable in whole domain of their existence. In the case of self-defocusing nonlinearity, both surface gap and twisted solitons are predicted in first gap. We discover that surface gap solitons can propagate stably in whole existence domain except for an extremely narrow region close to the Bloch band, and twisted solitons are linearly unstable in the entire existence domain.