Counterpropagating beams in rotationally symmetric photonic lattices

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• 作者：Dragana Jovi&#x107 ; Raka Jovanovi&#x107 ; Slobodan Prvanovi&#x107 ; Milan Petrovi&#x107 ; ; Milivoj Beli&#x107
• 关键词：Circular photonic lattices ; Ring defects ; Solitonic structures
• 刊名：Optical Materials
• 出版年：2008
• 期刊代码：81_09253467
• 类别：ch
• 出版时间：March 2008
• 卷：30
• 期：7
• 页码：1173-1176
• 文件大小：1826 K

摘要

Various properties of counterpropagating mutually incoherent self-trapped beams in optically induced circular photonic lattices with ring defects are investigated numerically. We utilize a local isotropic dynamical model with a Kerr-type saturable nonlinearity. Different incident beam structures are considered. We find spontaneous symmetry breaking of the head-on propagating Gaussian beams. In the case of vortices, we observe beam filamentation and a strong pinning of filaments to the lattice sites. Using a modified Petviashvili’s method, we report several novel solitonic structures.