铌酸锂
谐振器
二次谐波产生
能量转换效率
材料科学
极化
光学
光电子学
准相位匹配
非线性光学
铁电性
物理
激光器
电介质
作者
Haoyang Du,Xiuquan Zhang,Hengyue Lv,Jintian Lin,Lei Wang,Feng Chen
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-12-08
卷期号:49 (2): 391-391
被引量:3
摘要
High-quality micro-resonators on thin-film lithium niobate (TFLN) have emerged as an ideal platform for on-chip nonlinear optical applications due to their strong light confinement and excellent natural nonlinear optical properties. Here, we present high-efficiency second-harmonic generation (SHG) in micro-resonators on a TFLN based on the modal phase matching and natural quasi-phase matching. By optimizing the phase-matching conditions through thermal tuning, we demonstrate an on-chip SHG efficiency of 149,000%/W in the low power regime. Furthermore, we achieve an absolute conversion efficiency of 10.3% with a 0.3 mW pump power. Our work paves the way toward future efficient on-chip frequency conversion of classical and quantum light without the need for poling of the LN films.
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