作为最早发现的非线性光学现象之一,非线性频率转换经过几十年的发展,从原理到应用均已不断成熟。非线性频率转换过程中新的相位匹配原理被不断提出和实现。除此之外,随着集成光学、结构光子学及量子光学等领域的不断发展,非线性频率转换在各领域的研究和应用又重新焕发活力,并发挥着不可替代的作用。本篇综述围绕非线性频率转换主题,突出非线性频率转换的新原理、新平台与新应用研究,并以本团队研究成果为基础,介绍相关领域的研究进展,主要分为以下几个方面:非线性界面相位匹配新原理;结构光场非线性谐波调控;铌酸锂薄膜集成非线性光学新平台;单光子频率转换、光量子接口等新应用。

Nonlinear frequency conversion techniques, which are one of the earliest studied nonlinear optical phenomena, have been developing for several decades. The principles and applications of nonlinear frequency conversion have become increasingly mature with time. In this study, new phase-matching principles associated with nonlinear frequency conversion are proposed and demonstrated. In addition, nonlinear frequency conversion has been reinvigorated by the continuous development of integrated photonics, structural photonics, and quantum optics and has played an irreplaceable role in various fields. Further, we focus on nonlinear frequency conversion and introduce its new principle, platform, and application. Based on the research of our group, we introduce the recent progress of nonlinear frequency conversion in related fields. The contents of this study include the new principle of phase matching at the nonlinear interface, nonlinear harmonic manipulation using structured light, integrated nonlinear optical new platform of lithium niobate thin film, and various new applications such as single-photon frequency conversion and optical quantum interface.