Analysis of mode characteristics for deformed square resonators by FDTD technique

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	Analysis of mode characteristics for deformed square resonators by FDTD technique
	Yu LJ
刊名	ieee journal of quantum electronics
	2006
卷号	42 期号:1-2 页码:59-63
关键词	finite-difference time-domain (FDTD) methods optical resonators modeling MICROCAVITIES
ISSN号	0018-9197
通讯作者	chen, q, chinese acad sci, inst semicond, state key lab integrated optoelect, beijing 100083, peoples r china. e-mail: chenqin@red.semi.ac.cn ; yzhuang@red.semi.ac.cn ; ylj@red.semi.ac.cn
中文摘要	the mode frequencies and quality factors (q-factors) in two-dimensional (2-d) deformed square resonators are analyzed by finite-difference time-domain (fdtd) technique. the results show that the deformed square cavities with circular and cut corners have larger q-factors than the perfect ones at certain conditions. for a square cavity with side length of 2 mu m and refractive index of 3.2, the mode q-factor can increase 13 times as the perfect corners are replaced by a quarter of circle with radius of 0.3 pm. furthermore the blue shift with the increasing deformations is found as a result of the reduction in effective resonator area. in square cavities with periodic roughness at sidewalls which maintains the symmetry of the square, the q-factors of the whisperin gallery (wg)-like modes are still one order of magnitude larger that those of non-wg-like modes. however, the q-tactors of these two types of modes are of the same order in the square cavity with random roughness. we also find that the rectangular and rhombic deformation largely reduce the q-factors with the increasing offset and cause the splitting of the doubly degenerate modes due to the breaking of certain symmetry properties.
学科主题	光电子学
收录类别	SCI
语种	英语
公开日期	2010-04-11
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/10848]
专题	半导体研究所_中国科学院半导体研究所（2009年前）
推荐引用方式 GB/T 7714	Yu LJ. Analysis of mode characteristics for deformed square resonators by FDTD technique[J]. ieee journal of quantum electronics,2006,42(1-2):59-63.
APA	Yu LJ.(2006).Analysis of mode characteristics for deformed square resonators by FDTD technique.ieee journal of quantum electronics,42(1-2),59-63.
MLA	Yu LJ."Analysis of mode characteristics for deformed square resonators by FDTD technique".ieee journal of quantum electronics 42.1-2(2006):59-63.