High-Q unidirectional emission properties of the symmetric half-spiral microcavities

被引：2
|
作者：
Tu, Xin [1 ]
Wu, Xiang [1 ]
Liu, Liying [1 ]
Xu, Lei [1 ,2 ,3 ]
机构：
[1] Fudan Univ, State Key Lab Adv Photon Mat & Devices, Sch Informat Sci & Engn, Dept Opt Sci & Engn, Shanghai 200433, Peoples R China
[2] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
[3] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China
来源：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2010年 / 27卷 / 02期
基金：
中国国家自然科学基金;
关键词：
LASERS;
D O I：
10.1364/JOSAB.27.000300
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Mode field patterns and light emissions of novel symmetric half-spiral microcavities (SHSMs) are investigated by the two-dimensional (2-D) finite-difference time domain (FDTD) method. The calculation results show that an SHSM can support high-quality (Q) (Q > 10(4)) distorted whispering-gallery modes with directional emissions. Moreover, artificial controls on the Q factor and emission directionality are realized in the coupled size-mismatched SHSMs, and unidirectional emission from the coupled cavity structure with a divergence of 19 degrees is achieved. (C) 2010 Optical Society of America
引用
收藏
页码：300 / 304
页数：5
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