中国物理B ›› 2009, Vol. 18 ›› Issue (2): 616-623.doi: 10.1088/1674-1056/18/2/038

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Solitons in optical lattices with nonlocal nonlinearity

葛丽娟, 王奇, 申明, 施解龙, 孔茜, 侯鹏   

  1. Department of Physics, Shanghai University, Shanghai 200444, China
  • 收稿日期:2008-04-07 修回日期:2008-09-17 出版日期:2009-02-20 发布日期:2009-02-20
  • 基金资助:
    Project supported in part by the National Natural Science Foundation of China (Grant Nos 60677030 and 60808002), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No 20060280007), the Science and Technology Commissio

Solitons in optical lattices with nonlocal nonlinearity

Ge Li-Juan(葛丽娟)†, Wang Qi(王奇), , Shen Ming(申明), Shi Jie-Long(施解龙), , Kong Qian(孔茜), and Hou Peng(侯鹏)   

  1. Department of Physics, Shanghai University, Shanghai 200444, China
  • Received:2008-04-07 Revised:2008-09-17 Online:2009-02-20 Published:2009-02-20
  • Supported by:
    Project supported in part by the National Natural Science Foundation of China (Grant Nos 60677030 and 60808002), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No 20060280007), the Science and Technology Commissio

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摘要： The propagation of spatial solitons is systematically investigated in nonlocal nonlinear media with an imprinted transverse periodic modulation of the refractive index. Based on the variational principle and the infinitesimal approximation of Maclaurin series expansion, we obtain an analytical solution of such nonlocal spatial solitons and an interesting result that the critical power for such solitons propagation is smaller than that in uniform nonlocal self-focusing media. It is found that there exist thresholds in modulation period and lattice depth for such solitons. A stable spatial soliton propagation is maintained with proper adjustment of the modulation period and the lattice depth.

Abstract: The propagation of spatial solitons is systematically investigated in nonlocal nonlinear media with an imprinted transverse periodic modulation of the refractive index. Based on the variational principle and the infinitesimal approximation of Maclaurin series expansion, we obtain an analytical solution of such nonlocal spatial solitons and an interesting result that the critical power for such solitons propagation is smaller than that in uniform nonlocal self-focusing media. It is found that there exist thresholds in modulation period and lattice depth for such solitons. A stable spatial soliton propagation is maintained with proper adjustment of the modulation period and the lattice depth.

Key words: optical lattice solitons, nonlocal nonlinearity

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

  • 42.65.Tg
42.65.Jx (Beam trapping, self-focusing and defocusing; self-phase modulation) 42.79.Wc (Optical coatings) 42.65.Hw (Phase conjugation; photorefractive and Kerr effects)