| Reduction of mode Q-factor due to coupling between fundamental and first order whispering-gallery modes in coupled microdisks |
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| 作者姓名： | LI Jun-jie WANG Jia-xian HUANG Yong-zhen |
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| 作者单位： | [1]College of Information Science and Engineering, Huaqiao University, Quanzhou 362021,China [2]State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China |
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| 摘 要： | The mode characteristics for twin coupled microdisks are investigated by finite-difference time-domain technique. In the coupled microdisks,the same order whispering-gallery(WG) modes can form coupled modes with split mode wavelengths. We find that the coupled fundamental and first order WG modes can have anticrossing mode coupling as their wavelengths approach the same value in some case,which prevents the cross of the coupled mode wavelengths. The anticrossing mode coupling greatly reduces the coupled mode Q-factor,because the coupled mode field distribution transfers between the fundamental and the first order WG modes.
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| 关 键 词： | 耦合微盘 基本阶 一阶 回音壁模式 Q值 约简 有限差分时域技术 |
| 文章编号： | 1673-1905（2007）03-0181-03 |
| 收稿时间： | 26 December 2006 |
| 修稿时间： | 2006-12-26 |
Reduction of mode Q -factor due to coupling between fundamental and first order whispering-gallery modes in coupled microdisks |
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| LI Jun-jie WANG Jia-xian HUANG Yong-zhen.Reduction of mode Q-factor due to coupling between fundamental and first order whispering-gallery modes in coupled microdisks[J].Opto-electronics Letters,2007,3(3):181-183. |
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| Authors: | Li Jun-jie Wang Jia-xian and Huang Yong-zhen |
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| Affiliation: | (1) College of Information Science and Engineering, Huaqiao University, Quanzhou, 362021, China;(2) State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China |
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| Abstract: | The mode characteristics for twin coupled microdisks are investigated by fmite-difference time-domain technique. In the coupled microdisks, the same order whispering-gallery (WG) modes can form coupled modes with split mode wavelengths.We find that the coupled fundamental and first order WG modes can have anticrossing mode coupling as their wavelengths approach the same value in some case, which prevents the cross of the coupled mode wavelengths. The anticrossing mode coupling greatly reduces the coupled mode Q-factor, because the coupled mode field distribution transfers between the fundamental and the first order WG modes. |
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| Keywords: | TN305 7 |
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