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Phys. Rev. A 80, 043824 (2009) [6 pages]

Defect-mediated discrete solitons in optically induced photorefractive lattices

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Yongyao Li1,2,*, Wei Pang3, Yongzhu Chen1,4, Zhiqiang Yu1, Jianying Zhou1,†, and Huarong Zhang1
1State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou 510275, China
2Department of Applied Physics, South China Agricultural University, Guangzhou 510642, China
3Department of Experiment, Guangdong University of Technology, Guangzhou 510006, China
4School of Electro-Mechanic Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China

Received 26 February 2009; revised 13 May 2009; published 20 October 2009

Theoretical analysis to the defect mediated discrete solitons in one- and two-dimensional periodical waveguide lattices is presented. The waveguide arrays with these functional defects are assumed to respond to the light field as an optically induced photorefraction and they are patterned by a holographic technique. It is found that the spatial energy distributions of the solitary waves can be controlled by the defects in the waveguide arrays, and this gives rise to an additional freedom to externally shaping the light field distribution to a special shape.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.80.043824
DOI:
10.1103/PhysRevA.80.043824
PACS:
42.65.Tg, 42.65.Hw, 42.40.Kw

*yongyaoli@gmail.com

stszjy@mail.sysu.edu.cn