Dual-band optical filter based on a single microdisk resonator.
Dual-band optical filter based on a single microdisk resonator.
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DOI：
10.1364/ol.36.004494
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发表时间：
2011-12
期刊：
影响因子：
3.6
通讯作者：
Qingzhong Huang;Xinliang Zhang;J. Xia;Jinzhong Yu
中科院分区：
文献类型：
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作者：
Qingzhong Huang;Xinliang Zhang;J. Xia;Jinzhong Yu
我们提出并实验证明了一个双波段光学滤波器的基础上，一个单一的微盘谐振器。建立了基于传输矩阵法的分析模型，并应用于模拟这种器件的特性。谐振腔中双模的竞争和干涉导致高隔离度的双频滤波。如时域有限差分模拟所示，通过优化紧凑型谐振器和波导之间的波导宽度和间隔间隙，可以有效地触发两个低阶谐振模式。在实验中，在纳米光子硅绝缘体平台上制作了双面耦合的微盘谐振器，实现了双波段带通滤波，光隔离度大于20 dB，插入损耗小于2 dB。实验结果与我们的建模结果吻合得很好。
We propose and experimentally demonstrate a dual-band optical filter based on a single microdisk resonator. An analytical model is built based on the transfer matrix method and is applied to simulate the properties of such a device. Competition and interference of the dual modes in the resonator lead to dual-band filtering with high isolation. As the finite-difference time-domain simulation illustrates, two low-order resonant modes can be effectively triggered by optimizing the waveguide width and spacing gap between the compact resonator and waveguides. In experiment, a double side-coupled microdisk resonator was fabricated on a nanophotonic silicon-on-insulator platform, and dual-band bandpass filtering is realized with an optical isolation higher than 20 dB and an insertion loss lower than 2 dB. The experimental results agree well with our modeling results.