Open AccessSpectrum control by anisotropy in a cylindrical microcavity
Author(s) -
Xueliang Kang,
Yongping Li,
Shan-Liang Qiu,
Jiaxing Cai
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.023843
Subject(s) - optics , anisotropy , whispering gallery wave , refractive index , whispering gallery , quality (philosophy) , wavelength , finite difference time domain method , optical microcavity , physics , permittivity , materials science , optoelectronics , dielectric , resonator , laser , quantum mechanics
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.