摘要
具有偏振结构分布的强激光与非线性光学材料相互作用导致了多种新颖的非线性光学效应,反映了材料的非线性光学特性,调制了光场的传播行为。笔者概述了矢量光场激发三阶非线性光学效应的研究进展。首先简要介绍了任意偏振光激发三阶非线性光学效应的理论,如非线性薛定谔方程、光束传播方程、各向同性和各向异性三阶非线性光学系数。也简要介绍了表征三阶非线性光学系数的Z-扫描技术。在弱聚焦条件下,给出了诸如径向偏振光、杂化偏振光和柠檬型庞加莱光束这三种类型矢量光场的焦场表达式。其次,重点回顾了多种矢量光场激发的各向同性/各向异性三阶非线性光学效应,包括径向偏振光激发的各向异性非线性光学效应、杂化偏振光激发的各向同性和各向异性非线性光学效应、柠檬型庞加莱光束激发的各向同性/各向异性非线性光学效应。最后,简要讨论了矢量光场在非线性偏振旋转、光束整形、可控光场塌缩与成丝和光限幅方面的应用。
Polarization-structured intense laser interacting with nonlinear optical material results in many novel third-order nonlinear optical effects,reflects the nonlinear optical property of the material,and modulates the propagation behavior of the beam itself.Herein,the research progress of third-order nonlinear optical effects excited by vectorial light fields was reviewed.Firstly,the basic theory of third-order nonlinear optical effects excited by arbitrary polarized lights was briefly introduced,such as nonlinear Schr?dinger equation,beam propagation equation,and isotropic and anisotropic third-order nonlinear optical coefficients.The Z-scan techniquefor characterizing third-order nonlinear optical coefficients was also introducd.Under the weak focusing condition,the expressions for the focal field of three types of vectorial light fields were provided,i.e.,radially polarized beams,hybridly polarized beams,and lemon-type Poincarébeams.Secondly,the isotropic and/or anisotropic third-order nonlinear optical effects excited by a variety of vectorial light fields was revisited,includinganisotropic nonlinear optical effects induced by radially polarized beams,isotropic and anisotropic Kerr nonlinearities excited by hybridly polarized beams,isotropic and anisotropic nonlinear optical effects induced by lemon-type Poincarébeams.Lastly,the prospects of their applications of vectorial light fields in nonlinear polarizationrotation,beam shaping,controllable field collapsing filaments,and optical limiting were briefly discussed.
作者
顾兵
胡月球
闻博
Gu Bing;Hu Yueqiu;Wen Bo(Advanced Photonics Center,Southeast University,Nanjing 210096,China)
出处
《红外与激光工程》
EI
CSCD
北大核心
2020年第12期267-279,共13页
Infrared and Laser Engineering
基金
国家自然科学基金(11774055)。
关键词
矢量光场
非线性折射
双光子吸收
各向同性
各向异性
vectorial light field
nonlinear refraction
two-photon absorption
isotropy
anisotropy
