Spectrum control by anisotropy in a cylindrical microcavity.
Spectrum control by anisotropy in a cylindrical microcavity made of electric anisotropic medium was studied. A finite-difference time domain method for electric anisotropic medium and Volume-average Effective Permittivity approximation are applied to calculate the resonant frequencies and quality factors of Whispering-gallery modes. The resonant frequency for different whispering-gallery modes has a similar shift in direct proportion to the relative difference of two principal refractive indices. The quality factors decay exponentially due to directional emission when the difference of two principal refractive indices increases. This novel tuning characteristic of anisotropic cylindrical microcavity will play an important role in many areas, such as light source with tunable wavelength, tunable filter and sensor.
Kang
Xue-Liang
XL
Key Laboratory of Quantum Information, Chinese Academy of Science, Hefei, 230026, China.
Li
Yong-Ping
YP
Qiu
Shan-Liang
SL
Cai
Jia-Xing
JX
D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008904:Miniaturization; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*