ABSTRACT

Lithium niobate on insulator (LNOI), by taking advantage of versatile properties of lithium niobate (LN) and a large refractive index contrast, provides an ideal on-chip platform for studying a broad range of optical effects as well as developing various superior photonic devices. It is a game-changer technology for traditional LN-based applications. Especially, with recent advances in the fabrication of high-quality micro-/nano-structures and devices on the LNOI platform, LN-based integrated photonics has been propelled to new heights. In this review, we summarize the latest research advances in lithium niobate thin film (LNTF), with a special focus on nonlinear wave mixing and their photonics applications. Different types of second- and third-order nonlinear processes in LNOI micro- and nano-structures are reviewed, including nonlinear frequency conversion, frequency comb generation and supercontinuum generation. Furthermore, perspectives for photonic integrated circuits (PICs) on the LNOI platform in nonlinear optics regime are predicted.

摘要

绝缘体上的铌酸锂（LNOI）通过利用铌酸锂（LN）的多种特性和较大的折射率对比，为研究广泛的光学效应以及开发各种优异的光子器件提供了理想的片上平台。它是传统基于LN的应用程序的改变游戏规则的技术。特别是，随着在LNOI平台上制造高质量微/纳米结构和器件的最新进展，基于LN的集成光子技术已被推向新的高度。在这篇综述中，我们总结了铌酸锂薄膜（LNTF）的最新研究进展，特别关注非线性波混频及其光子学应用。回顾了LNOI微观和纳米结构中不同类型的二阶和三阶非线性过程，包括非线性频率转换，频率梳生成和超连续谱生成。此外，预测了非线性光学领域中LNOI平台上的光子集成电路（PIC）的前景。