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利用多重散射法数值模拟了多个具有五个缺陷点的氧化铝介质柱四方晶格二维光子晶体微腔的透过率T和品质因子Q.结果表明,沿x、y方向介质柱的个数Lx、Ly以及介质柱半径r对微腔品质因子和透过率均有明显影响.通过优化参数,实现了一类具有大透过率T、高品质因子Q的微腔.在模拟范围内,当Lx=13、Ly=17和r=0.25时,微腔品质因子和透过率同时达到较大值,分别为49 270和91%.
The multi-scattering method was used to numerically simulate the transmissivity T and quality factor Q of a series of two-dimensional photonic crystal microchannels with four defect points in the alumina dielectric column. The results show that the The number of Lx, Ly and the radius of the dielectric column r have a significant impact on the quality factor and transmittance of the microcavity. By optimizing the parameters, a class of microcavities with large transmittance T and high quality factor Q are achieved. In the simulation range When Lx = 13, Ly = 17 and r = 0.25, the microcrack quality factor and transmittance reached the maximum at the same time, reaching 49 270 and 91% respectively.