Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (4): 44207-044207.doi: 10.1088/1674-1056/22/4/044207

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

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

王建东, 纪红, 刘普生   

  1. School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
  • 收稿日期:2012-09-02 修回日期:2012-09-25 出版日期:2013-03-01 发布日期:2013-03-01
  • 基金资助:
    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).

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)   

  1. School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:2012-09-02 Revised:2012-09-25 Online:2013-03-01 Published:2013-03-01
  • Contact: Wang Jian-Dong E-mail:jdwang@uestc.edu.cn
  • Supported by:
    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).

摘要: 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.

关键词: vortex soliton, Bloch band gap, nonlinear periodic lattice

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.

Key words: vortex soliton, Bloch band gap, nonlinear periodic lattice

中图分类号:  (Optical solitons; nonlinear guided waves)

  • 42.65.Tg
05.45.Yv (Solitons)