Self-trapping of optical vortices at the surface of an induced semi-infinite photonic lattice
This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.18.005873. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
We demonstrate self-trapping of singly-charged vortices at the surface of an optically induced two-dimensional photonic lattice. Under appropriate conditions of self-focusing nonlinearity, a singly-charged vortex beam can self-trap into a stable semi-infinite gap surface vortex soliton through a four-site excitation. However, a single-site excitation leads to a quasi-localized state in the first photonic gap, and our theoretical analysis illustrates that such a bandgap surface vortex soliton is always unstable. Our experimental results of stable and unstable topological surface solitons are corroborated by direct numerical simulations and linear stability analysis.
DH Song, CB Lou, KJH Law, LQ Tang, ZY Ye, PG Kevrekidis, JJ Xu, and ZG Chen. "Self-trapping of optical vortices at the surface of an induced semi-infinite photonic lattice" Optics Express 18.6 (2010): 5873-5878.
Available at: http://works.bepress.com/panos_kevrekidis/110