Second harmonic generation in nano-structured thin-film lithium niobate waveguides
Second harmonic generation in nano-structured thin-film lithium niobate waveguides
复制标题
纳米结构薄膜铌酸锂波导中的二次谐波产生
DOI：
10.1364/oe.25.006963
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发表时间：
2017-03-20
期刊：
影响因子：
3.8
通讯作者：
Loncar, Marko
中科院分区：
文献类型：
--
作者：
Wang, Cheng;Xiong, Xiao;Loncar, Marko
集成薄膜铌酸锂平台最近已成为下一代高效波长转换系统的有前途的候选者，这些系统允许密集封装和大规模生产。在这里，我们展示了在光刻定义的亚微米尺寸的LiNbate薄膜光波导中高效的、相位匹配的二次谐波产生。从理论上提出了固定宽度光波导中的模位相匹配和周期槽波导中的准位相匹配，并进行了实验验证。我们的低损耗(类似于3.0dB/cm)纳米波导归一化转换效率高达41%W(-1)cm(-2)。(C)2017年美国光学学会
Integrated thin-film lithium niobate platform has recently emerged as a promising candidate for next-generation, high-efficiency wavelength conversion systems that allow dense packaging and mass-production. Here we demonstrate efficient, phase-matched second harmonic generation in lithographically-defined thin-film lithium niobate waveguides with sub-micron dimensions. Both modal phase matching in fixed-width waveguides and quasi-phase matching in periodically grooved waveguides are theoretically proposed and experimentally demonstrated. Our low-loss (similar to 3.0 dB/cm) nanowaveguides possess normalized conversion efficiencies as high as 41% W(-1)cm(-2). (C) 2017 Optical Society of America