铌酸锂变换光学波导中彩虹捕获与宽带非线性  

Rainbow Trapping and Broadband Nonlinearity in Lithium Niobate Transformation Optical Waveguides

作　　者：宗心牧 黄春雨 盛冲 祝世宁[1] 刘辉[1] Zong Xinmu;Huang Chunyu;Sheng Chong;Zhu Shining;Liu Hui(Collaborative Innovation Center of Advanced Microstructures,National Laboratory of Solid State Microstructures,School of Physics,Nanjing University,Nanjing 210093,Jiangsu,China)

机构地区：[1]南京大学物理学院固体微结构物理国家重点实验室,人工微结构科学与技术协同创新中心,江苏南京210093

出　　处：《光学学报》2022年第21期81-88,共8页Acta Optica Sinica

基　　金：国家重点研发计划(2017YFA0303700,2017YFA0303702);国家自然科学基金(11690033,61425018,11621091,12174187);中央高校基本科研专项(14380139)。

摘　　要：变换光学的发展与应用为实现片上集成多频传输和宽带非线性光子器件的设计提供了新的方法。基于变换光学理论模型,通过在铌酸锂(LiNbO_(3))薄膜光子晶体中调控色散和群速度的空间分布,获得了具有片上彩虹捕获特性的波导器件。通过对非线性四波混频过程进行分析,展示了其在宽带四波混频方面具有良好的应用前景。同时,所设计的变换光学波导结构也可应用于其他集成非线性光学器件。The development and application of transformation optics provide a new approach to onchip integrated multifrequency transmission and the design of broadband nonlinear photonic devices.In this paper,a model based on the transformation optics theory is utilized to obtain a waveguide device featuring onchip rainbow trapping by manipulating the spatial distribution of dispersion and group velocity of thinfilm lithium niobate photonic crystals.The analysis of the nonlinear fourwave mixing process reveals the bright application prospect of the proposed waveguide device in broadband fourwave mixing.The transformation optical waveguide structure designed can also be applied to other nonlinear integrated optical devices.

关 键 词：物理光学 光学器件 彩虹捕获 铌酸锂薄膜 变换光学 光子晶体 

分 类 号：O436[机械工程—光学工程]