中国物理B ›› 2009, Vol. 18 ›› Issue (10): 4319-4325.doi: 10.1088/1674-1056/18/10/038
何影记1, 罗莉2, 朱伟玲3, 汪河洲4
Zhu Wei-Ling(朱伟玲)a), Luo Li(罗莉)b), He Ying-Ji(何影记)c)†, and Wang He-Zhou(汪河洲)d)
摘要: We study the surface defect gap solitons in an interface between a defect of one-dimensional dual-frequency lattices and the uniform media. Some unique properties are revealed that such lattices can broaden the region of semi-finite gap, and the semi-finite gap exists not only in the positive and zero defects but also in the negative defect; unlike in the regular lattices, the semi-finite gap exists in the positive and zero defects but does not exist in the negative defect. In particular, stable solitons exist almost in the whole semi-finite gap for the positive and zero defects. These properties are different from other lattices with defects. In addition, it is found that the existence of surface dual-frequency lattice solitons does not need a threshold power.
中图分类号: (Photonic bandgap materials)