摘要
微腔模式特性的研究是微腔各种应用的基础。采用时域有限差分方法(FDTD)可以获得微腔模式的频谱响应特性。通过对平面平行腔的验证,发现FDTD方法可以获得同理论较吻合的结果。对平面圆腔的回音壁模(WGM)腔模特性的分析表明;这种腔体尺寸同波长相当的谐振腔具有较好的选模特性．通过腔边界由两个带变形参数的圆弧所构成的平面异型微腔在不同变形参数下模式特性的细致研究,则发现通过改变腔形可以达到改善腔模模式特性的目的,这表明优化腔形设计是优化腔性能的一条可行思路。
The study of mode characteristics is a foundation for various applications of microcavity. The finite difference time domain （FDTD） technique is used to obtain the responce characteristics of cavity-mode spectra. The FDTD technique is demonstrated in the case of plane-parallel cavity, and the numerical results can coincide well with the theory results. The whisper gallery mode （WGM） characteristics of the plane-circular cavity are analyzed, and the results indicate that wavelength-scale cavities have good mode-selecting power. The detailed research on plane asymmetric resonant cavities composed of two arched boundary under different deformation parameter indicates that by changing the cavity shape the purpose of improving the performances of microcavities can be achieved. The results also show that it is a practical way to optimize the performance of cavities by optimizing cavity shape.
出处
《量子电子学报》
CAS
CSCD
北大核心
2007年第1期27-31,共5页
Chinese Journal of Quantum Electronics
关键词
光电子学
异型腔
有限时域差分
微腔
回音壁模
optoelectronics
asymmetric resonant cavities
finite difference time domain
microcavity
whisper gallery mode
