Light Propagation and Localization Properties of Edge States in Diatomic Square Lattice

doi:10.3788/gzxb20154405.0516001

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	Light Propagation and Localization Properties of Edge States in Diatomic Square Lattice
	Wang Daobin; Yuan Lihua; Lei Jingli; Li Xiaoxiao; Hou Shanglin
刊名	光子学报
	2015
卷号	44 期号:5 页码:0516001-1-0516001-7
关键词	Nanophotonics Photonic devices Finite difference time domain method Diatomic square lattice Surface waves Optical band gaps Slow light Group velocity dispersion Optical memories
ISSN号	1004-4213
DOI	10.3788/gzxb20154405.0516001
英文摘要	Utilizing the plane wave expansion method, it is found that there are two types of edge states existing on the surface termination along the GammaM direction of a diatomic photonic crystal. Through analying the surface mode band structure and the field distribution, the effect of the edge parameter on the waveguiding properties of these edge states were investigated. The group index and group velocity dispersion parameter were calculated according to the dispersion curves. The results demonstrate that the variation of the edge parameter has a very slight effect on the light propagation properties of first type of edge state. Its average group index is always around 5.0. The second edge state is obviously different with the first state and the variation of edge parameters can control the propagation performance of this mode efficiently. The maximal average group index of this edge state can achieve 178. The finite difference time domain methods was used to record the electric field distributions and amplitudes near the surface at different times. From the obtained results, it is found that these edge states can be confined in the area near the surface termination and propagate forward. The group velocity extracted from the finite difference time domain method is consistent with the result from the plane wave expansion method.
WOS研究方向	Physics
语种	英语
CSCD记录号	CSCD:5426987
出版者	Chinese Optical Society
状态	已发表
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/71017]
专题	理学院
作者单位	School of Science, Lanzhou University of Technology, Lanzhou, Gansu 730050, China
推荐引用方式 GB/T 7714	Wang Daobin,Yuan Lihua,Lei Jingli,et al. Light Propagation and Localization Properties of Edge States in Diatomic Square Lattice[J]. 光子学报,2015,44(5):0516001-1-0516001-7.
APA	Wang Daobin,Yuan Lihua,Lei Jingli,Li Xiaoxiao,&Hou Shanglin.(2015).Light Propagation and Localization Properties of Edge States in Diatomic Square Lattice.光子学报,44(5),0516001-1-0516001-7.
MLA	Wang Daobin,et al."Light Propagation and Localization Properties of Edge States in Diatomic Square Lattice".光子学报 44.5(2015):0516001-1-0516001-7.