Reduction of mode Q-factor due to coupling between fundamental and first order whispering-gallery modes in coupled microdisks

作     者：LI Jun-jie WANG Jia-xian HUANG Yong-zhen 

作者机构：College of Information Science and Engineering Huaqiao University Quanzhou 362021China State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China 

出 版 物：《Optoelectronics Letters》 (光电子快报（英文版）)

年 卷 期：2007年第3卷第3期

页      面：181-183页

学科分类：080903[工学-微电子学与固体电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：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 

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.