Eur. Phys. J. D (2015) 69: 49
https://doi.org/10.1140/epjd/e2015-50753-0

Regular Article

Goos-Hänchen shifts of Helmholtz solitons at nonlocal nonlinear interfaces

¹ School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, P.R. China
² Department of Physics, Guangdong university of Education, Guangzhou 510303, P.R. China

^a e-mail: szwstar@gdut.edu.cn
^b e-mail: lihuagang@gdei.edu.cn

Received: 15 October 2014
Received in final form: 16 December 2014
Published online: 19 February 2015

Abstract

We address the nonlinear Goos-Hänchen shift of Helmholtz solitons at a nonlocal nonlinear interface between a Kerr medium and a nonlocal nonlinear medium. Based on the framework of the Helmholtz theory, we have demonstrated that the Goos-Hänchen shift depends on the angle of the incidence, the linear and nonlinear refractive index mismatch at the interface, the nonparaxial parameter and the degree of nonlocality. Interestingly, internal and external refraction can be introduced when the nonlinear refractive index mismatch is greater than a threshold value. The total reflection will occur when the degree of nonlocality exceeds a value.