轨道角动量光束非线性转换研究进展  

Recent progress on frequency conversion of orbital angular momentum carrying light

作　　者：周志远[1] 史保森[1] ZHOU Zhiyuan;SHI Baosen(CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学技术大学,中国科学院量子信息重点实验室,安徽合肥230026

出　　处：《量子电子学报》2022年第1期32-49,共18页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金重大研究计划培育项目和重点项目,11934013,92065101。

摘　　要：轨道角动量(OAM)是光的一个重要的自由度。由于携带OAM的光束具有特殊的强度相位分布以及力学效应,使得此类光束在高速光通信、测量、成像、光镊和量子信息中具有广泛的应用。关于OAM光束在准相位匹配晶体(QPM)中的频率变换研究,一方面可以研究OAM光束参与非线性相互作用时与高斯光束不同的物理机制;另一方面,非线性过程提供了多种有效的光场调控手段,可以实现携带OAM光场不同自由度的精细调控,为满足不同的光学应用奠定基础。综述了近十年来OAM光束在QPM晶体中的非线性转换研究主要进展,具体包括:非线性过程中OAM光束的守恒、传输、演化和干涉行为研究,高效率的OAM激光和单光子态频率转换研究,OAM频率转换效率模式非依赖性研究,矢量光束的频率转换研究,以及无后向选择的高维OAM纠缠态的制备研究。最后讨论和展望了OAM在QPM晶体中频率转换方面的未来研究趋势。Orbital angular momentum(OAM)is an important degree of freedom of light.As having unique phase and intensity distribution,OAM-carrying light has wide applications in high capacity optical communication,metrology,imaging,optical tweezers and quantum information processing.In one hand,frequency conversion with OAM-carrying light in nonlinear process shows new optical physics different from that of Gaussian beam.On the other hand,nonlinear optics offers various tool kits to manipulate different content of light,which can be used to generate specific light field for target applications.In this article,the main progress for frequency conversion of OAM-carrying light in quasi-phase matching nonlinear crystals is reviewed,including the conservation,propagation,evolution and interference of OAM-carrying light in frequency conversion,high efficiency nonlinear frequency conversion for OAMcarrying light,realization of frequencey conversion efficiency independent of the input signal modes,frequency conversion of vector vortex beam,and generation of high dimensional OAM entangled states without post selection based on pump beam engineering.Finally,some discussions and outlooks for future research trends in this field are put forward.

关 键 词：量子光学 轨道角动量 准相位匹配 非线性频率转换 矢量涡旋光束 

分 类 号：O431.2[机械工程—光学工程]