Chinese Optics Letters, 2013, 11 (9): 090801, Published Online: Sep. 3, 2013
Self-trapping and oscillation of quadruple beams in high band gap of 2D photonic lattices
080.1238 Array waveguide devices 190.4420 Nonlinear optics, transverse effects in 050.4865 Optical vortices
Abstract
Higher-band self-trapping and oscillation (rotation) of nonlinear quadruple beams in two-dimensional (2D) square photonic lattices are numerically demonstrated. Under appropriate conditions of nonlinearity, a quadruple-like beam can self-trap into localized modes that reside in the second Bragg reflection gap through single-site excitation. By changing the initial orientation of the incident quadruple beam related to the lattices, periodic oscillations of the localized quadruple mode may be obtained. The localized quadruple state becomes a rotating doubly charged optical vortex (DCV) during rotation and should undergo charge-flipping when the rotating direction is reversed.
Shiqiang Xia, Daohong Song, Liqin Tang, Cibo Lou, Yigang Li. Self-trapping and oscillation of quadruple beams in high band gap of 2D photonic lattices[J]. Chinese Optics Letters, 2013, 11(9): 090801.