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Chin. Phys. B, 2013, Vol. 22(4): 044207    DOI: 10.1088/1674-1056/22/4/044207
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Vortex solitons in the semi-infinite gap of optically induced periodic lattices

Wang Jian-Dong (王建东), Ji Hong (纪红), Liu Pu-Sheng (刘普生)
School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
Abstract  Vortex solitons with a ring vortex core residing in a single lattice site in the semi-infinite gap of square optical lattices are reported. These solitons are no longer bound states of the Bloch-wave unit (Bloch-wave distribution in one lattice site) at the band edge of the periodic lattice, and consequently they do not bifurcate from the corresponding band edge. For saturable nonlinearity, one family of such solitons is found, and its existing curve forms a closed loop, which is very surprising. For Kerr nonlinearity, two families of such vortex solitons are found.
Keywords:  vortex soliton      Bloch band gap      nonlinear periodic lattice  
Received:  02 September 2012      Revised:  25 September 2012      Accepted manuscript online: 
PACS:  42.65.Tg (Optical solitons; nonlinear guided waves)  
  05.45.Yv (Solitons)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10904009) and the Fundamental Research Funds for the Central Universities (Grant Nos. ZYGX2011J039 and ZYGX2011J047).
Corresponding Authors:  Wang Jian-Dong     E-mail:  jdwang@uestc.edu.cn

Cite this article: 

Wang Jian-Dong (王建东), Ji Hong (纪红), Liu Pu-Sheng (刘普生) Vortex solitons in the semi-infinite gap of optically induced periodic lattices 2013 Chin. Phys. B 22 044207

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