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ShanghaiTech University Knowledge Management System
| On-chip Brillouin Amplifier in Suspended Lithium Niobate Nanowaveguides | |
| 2024-12-16 | |
| 状态 | 已发表 |
| 摘要 | Thin film lithium niobate (TFLN) has emerged as a leading material platform for integrated nonlinear photonics, enabling transformative applications such as broadband Kerr soliton microcomb and high-speed electrooptic modulation. While stimulated Brillouin scattering has been numerically proposed in TFLN, achieving sufficient gain remains challenging due to the requirement for the simultaneous low optical and mechanical losses of the device. In this work, we systematically characterize the angle-dependence of Brillouin gain coefficients in x-cut membrane-suspended TFLN nanowaveguides, taking into account the anisotropy of the photoelastic coefficients in lithium niobate. We report a Brillouin gain coefficient of 129.5 mâ 1Wâ 1 and further demonstrate the Brillouin frequency tuning through variations in either pump frequency or chip operating temperature. Based on the suspended TFLN nanowaveguide, by optimizing the confinement of both photonic and phononic modes, we have achieved a Brillouin amplifier with a record-high gain of 8.5 dB. This result not only validates the feasibility of strong guided Brillouin interaction using suspended TFLN nanowaveguides, but also paves the way for novel on-chip sensing and signal processing applications. |
| 语种 | 英语 |
| DOI | arXiv:2412.11748 |
| 相关网址 | 查看原文 |
| 出处 | Arxiv |
| 收录类别 | PPRN.PPRN |
| WOS记录号 | PPRN:119962910 |
| WOS类目 | Optics |
| 资助项目 | National Natural Science Foundation of China["62305214","92265210","12293053"] |
| 文献类型 | 预印本 |
| 条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/483969 |
| 专题 | 信息科学与技术学院 信息科学与技术学院_PI研究组_陈佰乐组 信息科学与技术学院_硕士生 信息科学与技术学院_博士生 信息科学与技术学院_PI研究组_陆娟娟组 |
| 通讯作者 | Zou, Chang-Ling |
| 作者单位 | 1.ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai 201210, Peoples R China 2.Univ Sci & Technol China, CAS Key Lab Quantum Informat, Hefei 230026, Peoples R China 3.Shanxi Univ, Inst Optoelect, Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Simin,Zhou, Ruixin,Yang, Guangcanlan,et al. On-chip Brillouin Amplifier in Suspended Lithium Niobate Nanowaveguides. 2024. |
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