High-Q cavity based on gradated one-dimensional photonic crystal

来源 :Chinese Physics B | 被引量 : 0次 | 上传用户:qiujunzhang
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A high quality-factor(Q) cavity based on a one-dimensional(1D) photonic crystal with gradated elliptical holes was designed using FDTD simulation. Different gradient profiles of the mirror holes were found to correspond to different Qvalues of the cavities. A simple strategy is proposed to construct high-Q cavities by using an S-shaped gradient profile for the elliptical holes’ minor axes, such as a cosine function or Gaussian function. Using such a strategy, a Q value exceeding two million is obtained with only ten mirror holes in a cavity. A high quality-factor (Q) cavity based on a one-dimensional (1D) photonic crystal with gradated elliptical holes was designed using FDTD simulation. Different gradient profiles of the mirror holes were found to correspond to different to Qvalues ​​of the cavities. A simple strategy is proposed to construct high-Q cavities by using an S-shaped gradient profile for the elliptical holes’ minor axes, such as a cosine function or Gaussian function. using such a strategy, a Q value exceeding two million is obtained with only ten mirror holes in a cavity.
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