Opt Lett. 2019 Mar 15;44(6):1524-1527. doi: 10.1364/OL.44.001524.
Cascading of the electro-optic (EO) effect and nonlinear wave mixing can provide a way to manipulate photonic conversion in an electrically controllable manner. Here we experimentally demonstrate simultaneous transverse EO coupling and second-harmonic generation (SHG) in a periodically poled lithium niobate on insulator ridge waveguide. With tight light confinement, large EO, and nonlinear coefficients in the LNOI waveguide, the integrated device features a low-voltage fast-speed response for EO coupling and efficient conversion for SHG. The proposed scheme holds promise in realizing electrically controllable on-chip nonlinear devices.
级联电光（EO）效应和非线性波混合可以提供一种以电可控的方式操纵光子转换的方法。在这里，我们在绝缘体脊波导上的周期性极化铌酸锂中实验证明了横向 EO 耦合和二次谐波产生（SHG）的同时发生。由于 LNOI 波导中的光限制紧密、EO 和非线性系数较大，该集成器件具有低电压快速响应的 EO 耦合和高效的 SHG 转换。所提出的方案有望实现电可控的片上非线性器件。
