硫化镉纳米线集成氮化硅光子学的二次谐波和和频产生

IF 6.5 1区 物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Jianguo Wang, Junling Qu, Binbin Wang, Ruixuan Yi, Liang Fang, Like Shui, Zhonglin Xie, Chenyang Zhao, Jie Wang, Jianlin Zhao, Xuetao Gan
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引用次数: 0

摘要

我们展示了二阶(χ(2))非线性响应,包括氮化硅(SiN)波导的二次谐波产生(SHG)和和频产生(SFG),通过确定地将χ(2)有源亚波长CdS纳米线(NWs)纳入其中,解决了SiN的χ(2)中心对称缺陷。通过设计混合CdS NW-SiN波导的尺寸,我们实现了SHG的模态相位匹配,从条纹波导中获得0.76% W-1的转换效率。通过植入微环谐振器结构,它们的转换效率提高了约100倍。最后,使用基于χ(2)的混合波导的光混频,我们探索了将其作为自相关器用于超快激光脉冲持续时间的片上测量,并获得了仅与商业产品偏差4%的结果。这种混合CdS NW-SiN波导策略解决了SiN波导平台缺乏χ(2)相关功能的问题,为其在集成非线性光子学中的应用铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Second-Harmonic and Sum-Frequency Generation in Silicon Nitride Photonics Integrated with Cadmium Sulfide Nanowire

Second-Harmonic and Sum-Frequency Generation in Silicon Nitride Photonics Integrated with Cadmium Sulfide Nanowire
We demonstrate second-order (χ(2)) nonlinear responses including second-harmonic generation (SHG) and sum-frequency generation (SFG) from the silicon nitride (SiN) waveguides by deterministically incorporating χ(2)-active subwavelength CdS nanowires (NWs) inside them, addressing the χ(2) deficiency of the SiN for being centrosymmetric. By engineering the dimensions of the hybrid CdS NW-SiN waveguide, we achieved modal phase-matching for SHG, yielding conversion efficiencies of 0.76% W–1 from a stripe waveguide. By implanting a microring resonator configuration, ∼ 100 times higher conversion efficiencies of them were obtained. Finally, using the χ(2)-based optical wave-mixing of the hybrid waveguide, we explored its use as an autocorrelator for the on-chip measurement of the ultrafast laser pulse duration and achieved a result only 4% deviated from that of a commercial product. This hybrid CdS NW-SiN waveguide strategy solved the lack of the χ(2)-related functionalities of the SiN waveguide platform and paves the way for its applications in integrated nonlinear photonics.
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来源期刊
ACS Photonics
ACS Photonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
11.90
自引率
5.70%
发文量
438
审稿时长
2.3 months
期刊介绍: Published as soon as accepted and summarized in monthly issues, ACS Photonics will publish Research Articles, Letters, Perspectives, and Reviews, to encompass the full scope of published research in this field.
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