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Defect solitons in two dimensional optical lattices with line defect

GUANG-YU JIANG1,2,* , YOU-WEN LIU1

Affiliation

  1. Department of Applied Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  2. Key Laboratory of Nondestructive Testing (Ministry of Education), Nanchang Hangkong University, Nanchang 330063, China

Abstract

The existence, stability and propagation properties of defect solitons in two-dimensional optical lattices with a line defect are investigated analytically and numerically. When line defects with various defect intensities are introduced into two-dimensional optical lattices, defect solitons can exist in different bandgaps. Some unique characteristics show that the line defect embedded into two-dimensional optical lattices can profoundly influence the shape, stability and propagation of solitons. For a positive defect, the solitons only exist in the semi-infinite gap and cannot be stable in the high power region. For a negative defect, the solitons can exist not only in the semi-infinite gap, but also in the first gap;the solitons are stable in the moderate power region in the first gap..

Keywords

Nonlinear optics, Soliton propagation, Lattices.

Citation

GUANG-YU JIANG, YOU-WEN LIU, Defect solitons in two dimensional optical lattices with line defect, Optoelectronics and Advanced Materials - Rapid Communications, 6, 3-4, March-April 2012, pp.347-351 (2012).

Submitted at: Feb. 14, 2012

Accepted at: April 11, 2012