铌酸锂
拉曼散射
光学
材料科学
声子
拉曼光谱
薄膜
二次谐波产生
非线性光学
散射
光电子学
物理
激光器
凝聚态物理
纳米技术
作者
Yuxuan He,Xiongshuo Yan,Jiangwei Wu,Xiangmin Liu,Yuping Chen,Xianfeng Chen
出处
期刊:Optics Letters
[The Optical Society]
日期:2024-08-12
卷期号:49 (17): 4863-4863
摘要
High-quality microresonators can greatly enhance light-matter interactions and are excellent platforms for studying nonlinear optics. Wavelength conversion through nonlinear processes is the key to many applications of integrated optics. The stimulated Raman scattering (SRS) process can extend the emission wavelength of a laser source to a wider range. Lithium niobate (LN), as a Raman active crystalline material, has remarkable potential for wavelength conversion. Here, we demonstrate the generation of cascaded multi-phonon Raman signals near the second-harmonic generation (SHG) peak in an X-cut thin-film lithium niobate (TFLN) microdisk. Fine tuning of the specific cascaded Raman spectral lines has also been made by changing the pump wavelength. Raman lines can reach a wavelength up to about 80 nm away from the SHG signal. We realize the SFG process associated with Raman signals in the visible range as well. Our work extends the use of WGM microresonators as effective optical upconversion wavelength converters in nonlinear optical applications.
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