Non-volatile flexible-grid wavelength-selective switch using subwavelength-grating-Ge2Sb2Te5-assisted silicon microring resonators

IF 1.1 4区物理与天体物理 Q4 NANOSCIENCE & NANOTECHNOLOGY

Journal of Nanophotonics Pub Date : 2023-07-01 DOI:10.1117/1.JNP.17.036008

Dongfei Zheng, Dejun Kong, W. Liang, Pengjun Wang, Qiang Fu, Weiwei Chen, S. Dai, Jun Li, T. Dai, Jianyi Yang

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引用次数: 0

Abstract

Abstract. A non-volatile flexible-grid wavelength-selective switch (NVFGWSS) based on subwavelength-grating-Ge2Sb2Te5 (GST)-assisted silicon microring resonators (MRRs) is proposed. By controlling the state of the subwavelength grating GST and the phase shifter, the transmission spectra of the designed subwavelength-grating-GST-assisted silicon MRRs are combined, and thus tunable bandwidths (BWs) are generated as required. A comprehensive analysis of the presented subwavelength-grating-GST-assisted silicon MRRs and the corresponding NVFGWSS is given. Numerical simulations reveal that, for the designed module comprising a subwavelength-grating-GST-assisted silicon MMR and an ellipse-based crossing waveguide, its maximum crosstalk (CT) and insertion loss are −18.08 and 0.50 dB, respectively. For the designed NVFGWSS, as the channel spacing is 0.8 nm, the in-band ripple and CT are <0.895 and −13.006 dB, respectively, and the 3-dB BW changes from 0.51 to 3.2 nm.

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使用亚波长粒度的非易失性柔性栅极波长选择开关-Ge2Sb2Te5-辅助硅微环谐振器

摘要提出了一种基于亚波长晶粒-Ge2Sb2Te5（GST）辅助硅微环谐振器（MRR）的非易失性柔性栅极波长选择开关（NVFGWSS）。通过控制亚波长光栅GST和移相器的状态，组合所设计的亚波长光栅GST-辅助硅MRR的透射光谱，从而根据需要产生可调谐带宽（BWs）。对所提出的亚波长光栅GST辅助硅MRR和相应的NVFGWSS进行了综合分析。数值模拟表明，对于包括亚波长光栅GST辅助硅MMR和基于椭圆的交叉波导的设计模块，其最大串扰（CT）和插入损耗分别为-18.08和0.50dB。对于设计的NVFGWSS，由于通道间距为0.8 nm，带内纹波和CT分别<0.895和−13.006 dB，并且3dB BW从0.51变化到3.2nm。

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来源期刊

Journal of Nanophotonics 工程技术-光学

CiteScore

2.60

自引率

6.70%

发文量

审稿时长

3 months

期刊介绍： The Journal of Nanophotonics publishes peer-reviewed papers focusing on the fabrication and application of nanostructures that facilitate the generation, propagation, manipulation, and detection of light from the infrared to the ultraviolet regimes.