Improvement in the quality factors for photonic crystal nanocavities via visualization of the leaky components
Improvement in the quality factors for photonic crystal nanocavities via visualization of the leaky components
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DOI：
10.1364/oe.24.009541
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发表时间：
2016-05-02
期刊：
影响因子：
3.8
通讯作者：
Noda, Susumu
中科院分区：
文献类型：
--
作者：
Nakamura, Tatsuya;Takahashi, Yasushi;Noda, Susumu
提出了一种利用三维时域有限差分法计算二维光子晶体纳米腔品质因子的方法。高Q值纳米腔模式的泄漏区域在真实的腔结构中可视化，通过提取动量空间中的光锥内的泄漏分量，并通过使用逆傅立叶变换将它们转移回真实的空间。通过适当改变泄漏区空气孔的位置，Q值得到显著提高。我们设计了三个缺失空气孔和零单元缺陷的纳米腔，Q因子分别为5，000，000和1，700，000。(C)2016美国光学学会
A method that simply improves the quality (Q) factors of two-dimensional photonic crystal nanocavities using a three-dimensional finite-difference time domain calculation is described. The leaky area for a high-Q nanocavity mode is visualized in a real cavity structure by extracting the leaky components within a light cone in momentum space and by transferring them back into real space using an inverse Fourier transformation. The Q factor is remarkably improved by appropriately shifting the positions of air holes at the leaky area. We design three-missing- air-hole and zero-cell-defect nanocavities with Q factors of 5,000,000 and 1,700,000, respectively, for demonstration. (C) 2016 Optical Society of America