| 高Q值二维光子晶体缺三腔的数值模拟与分析 |
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| 引用本文： | 潘伟,余和军,张晓光,席丽霞.高Q值二维光子晶体缺三腔的数值模拟与分析[J].物理学报,2012,61(3):34209-034209. |
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| 作者姓名： | 潘伟 余和军 张晓光 席丽霞 |
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| 作者单位： | 北京邮电大学信息光子学与光通信研究院,北京,100876 |
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| 基金项目： | 国家自然科学基金(批准号: 10947150, 60977049)资助的课题. |
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| 摘 要： | 针对单光子源对高性能纳米腔的需要, 采用“柔性束缚"光子限制结构和时域有限差分法, 通过把时域和频域的光电场分布与理想高斯函数进行比较, 设计出一种高品质因子的光子晶体缺三腔(L3), 其Q值达Q=2.8×105, 有效模式体积为Veff=0.1813(λ/n)3, 相应的Purcell因子超过F=1.2×105. 此外, 提出一种定量描述腔性能优劣程度的能量系数分析法, 通过定量对比二维高斯分布下的场分布能量与总能量, 提高了腔的优化速度与准确性. 计算结果表明, 随着腔性能的优化, Q值正比于能量系数γ值直至饱和.
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| 关 键 词： | 光子晶体 缺三腔 时域有限差分法 能量系数γ |
| 收稿时间： | 3/7/2011 12:00:00 AM |
Numerical simulation and analysis of a high-Q two-dimensional photonic crystal L3 microcavity |
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| Pan Wei,Yu He-Jun,Zhang Xiao-Guang and Xi Li-Xia.Numerical simulation and analysis of a high-Q two-dimensional photonic crystal L3 microcavity[J].Acta Physica Sinica,2012,61(3):34209-034209. |
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| Authors: | Pan Wei Yu He-Jun Zhang Xiao-Guang and Xi Li-Xia |
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| Institution: | Institute of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China;Institute of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China;Institute of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China;Institute of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| Abstract: | A new double-heterostructure photonic crystal L3 microcavity is designed,under the condition of "gentle confinement",the quality factor of the cavity is optimized to reach as high as 2.8×105 by comparing the simulated mode distribution calculated by finite difference time domain algorithm with the ideal Gaussian distribution,while the mode volume remains small,Veff = 0.1813（λ/n）3. This is the best result at present.Additionally,an energy correlation coefficient is introduced to qualitatively describe the optimization level of a photonic crystal microcavity,which improves the speed and the accuracy of optimization. |
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| Keywords: | photonic crystal three holes defeat cavity finite difference time domain energy coefficient |
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