Transmission of nonparaxial nonlocal lattice solitons at nonlinear interfaces

¹ School of Information Engineering, Guangdong University of Technology - Guangzhou 510006, PRC
² Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University Guangzhou 510631, PRC
³ Department of Physics, Guangdong University of Education - Guangzhou 510303, PRC

^(a) guoq@scun.edu.cn
^(b) lihuagang@gdei.edu.cn

Received: 4 December 2013
Accepted: 24 April 2014

Abstract

We report on transmission of nonparaxial nonlocal lattice solitons at an arbitrary angle of incidence to the interface separating two nonlinear media with transverse periodic modulation of the refractive index. The energy distribution of solitons in two media can be varied by the degree of nonlocality, the nonlinear refractive index mismatch parameter at the interface, the nonparaxial parameter, the angle of incidence and the lattice parameters. Importantly, the modulation period and depth can introduce different regimes of soliton propagation in the media including refraction and trapping.