基于直径为7.2 μm的微盘谐振腔器件, 分别引入对称缺陷和非对称缺陷, 利用时域有限差分法研究缺陷位置和尺寸对各自微盘谐振腔各阶模式的影响.研究表明: 随着缺陷半径增大, 各阶谐振模式向短波长移动并且由高到低逐级受到抑制.在对称缺陷腔、非对称缺陷腔中内嵌一个微盘, 构成内嵌型双微盘谐振腔, 并优化缺陷腔、内嵌微盘尺寸及位置, 可实现1 128 nm、1 109 nm波长的稳定单模谐振.该内嵌型双微盘谐振腔微盘模式简单, 实现了谐振模式的简化, 具有广泛的应用前景.

Based on a microdisk resonator device with a diameter of 7.2 μm, the symmetric and asymmetric defects were introduced. By using the finite difference time domain method , the influences of the positions and dimensions of the defects on the resonant modes of microdisks were analyzed. The results show that with the increase of the radius of defects resonance modes firstly move towards shorter wavelength and then get suppressed progressively. Furthermore, a microdisk was introduced in two kinds of defects to form embedded-type dual microdisk resonators. After the optimization of the relative positions and dimensions, the single-mode resonance is realized at 1 128 nm and 1 109 nm. This device overcomes the drawbacks of single microdisk and simplifies the resonance mode, it can be applied in wider interest fields.