The 1 × 4 Optical Splitters Based on Silicon Photonic Crystal Self-Collimation Ring Resonators
The 1 × 4 Optical Splitters Based on Silicon Photonic Crystal Self-Collimation Ring Resonators
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DOI：
10.1088/0256-307x/29/12/124201
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发表时间：
2012-12
影响因子：
3.5
通讯作者：
Dongxia Zhuang;Xiyao Chen;Junjun Li;Zexuan Qiang;Junzhen Jiang;Zhiyong Chen;Y. Qiu;Hui Li
中科院分区：
文献类型：
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作者：
Dongxia Zhuang;Xiyao Chen;Junjun Li;Zexuan Qiang;Junzhen Jiang;Zhiyong Chen;Y. Qiu;Hui Li
报道了基于棒型和孔型硅光子晶体自准直环形谐振腔的不同分光比的1 × 4分光器。通过改变硅棒或空气孔的半径来形成OS的四个分束器。自准直效应可以控制沿着SCRR传播的光束。采用时域有限差分法（FDTD）分析了该结构在直通端口和分出端口处的透射谱。模拟结果与理论计算吻合较好。对于1550 nm的下降波长，棒型和孔型结构的自由光谱范围分别为28.8nm和32.5nm，几乎覆盖了整个光通信C波段窗口。这些结构的尺寸仅为10 μm × 10 μm。
We report 1 × 4 optical splitters (OSs) with different splitting ratios based on either rod-type or hole-type silicon photonic crystal self-collimation ring resonators (SCRRs). The four beam splitters of the OSs are formed by changing the radii of silicon rods or air holes. The light beam propagating along the SCRR can be controlled by the self-collimation effect. The transmission spectra at the through and drop ports are investigated by using the finite-difference time-domain (FDTD) method. The simulated results agree well with the theoretical calculation. For 1550-nm dropping wavelength, the free spectral ranges for rod-type and hole-type configurations are 28.8nm and 32.5nm, respectively, which almost cover the whole optical communication C-band window. The dimensions of these structures are only about 10 μm × 10 μm.