中国物理B ›› 2009, Vol. 18 ›› Issue (11): 4919-4923.doi: 10.1088/1674-1056/18/11/050

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Surface superlattice solitons in nonlocal nonlinear media

黄惠昌1, 汪河洲1, 何影记2   

  1. (1)State Key Laboratory of Optoelectronic Materials and Technologies, Zhongshan (Sun Yat-Sen) University, Guangzhou 510275, China; (2)State Key Laboratory of Optoelectronic Materials and Technologies, Zhongshan (Sun Yat-Sen) University, Guangzhou 510275, China;School of Electronics and Information, Guangdong Polytechnic Normal University, Guangzhou 510665, China
  • 收稿日期:2008-07-31 修回日期:2009-04-10 出版日期:2009-11-20 发布日期:2009-11-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10874250, 10674183 and 10804131) and National Basic Research Program of China (Grant No 2004CB719804).

Surface superlattice solitons in nonlocal nonlinear media

Huang Hui-Chang(黄惠昌)a), He Ying-Ji(何影记)a)b), and Wang He-Zhou(汪河洲)a)   

  1. a State Key Laboratory of Optoelectronic Materials and Technologies, Zhongshan (Sun Yat-Sen) University, Guangzhou 510275, China; b School of Electronics and Information, Guangdong Polytechnic Normal University, Guangzhou 510665, China
  • Received:2008-07-31 Revised:2009-04-10 Online:2009-11-20 Published:2009-11-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10874250, 10674183 and 10804131) and National Basic Research Program of China (Grant No 2004CB719804).

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摘要： We analyse surface solitons at the interface between a one-dimensional photonic superlattice and a uniform medium with weak nonlocal nonlinearity. We demonstrate that in deep lattices there exist three kinds of surface solitons when the propagation constant exceeds a critical value, including two on-site solitons and one off-site soliton. These three kinds of surface solitons have unique dynamical properties. If the relative depth of the superlattice is low, there is only one kind of off-site soliton; however, the solitons of this kind can propagate stably, unlike their deep superlattice counterparts. Dipole surface solitons are also investigated, and the stable domain is given.

关键词: surface solitons, superlattice, nonlocal nonlinearity

Abstract: We analyse surface solitons at the interface between a one-dimensional photonic superlattice and a uniform medium with weak nonlocal nonlinearity. We demonstrate that in deep lattices there exist three kinds of surface solitons when the propagation constant exceeds a critical value, including two on-site solitons and one off-site soliton. These three kinds of surface solitons have unique dynamical properties. If the relative depth of the superlattice is low, there is only one kind of off-site soliton; however, the solitons of this kind can propagate stably, unlike their deep superlattice counterparts. Dipole surface solitons are also investigated, and the stable domain is given.

Key words: surface solitons, superlattice, nonlocal nonlinearity

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

  • 42.65.Tg
42.79.-e (Optical elements, devices, and systems) 42.70.Qs (Photonic bandgap materials)