利用超表面探测光子轨道角动量的研究进展

Research Progress of Detecting Orbital Angular Momentum States of Photons Through Metasurfaces

电磁波具有线性动量、自旋角动量和轨道角动量。涡旋光束携带的轨道角动量在现代光学技术中具有巨大的应用潜力,在经典通信、量子通信、光学操纵以及旋转探测等领域具有重要的应用价值。近年来,国内外学者提出了多种探测光束轨道角动量的技术,如衍射光栅法、干涉测量法、多普勒分析法、超表面法。相比其他方法,超表面法具有效率高、光操纵性强等优点。主要介绍了几种利用超表面测量光束轨道角动量的方法及其研究进展、发展现状。

Electromagnetic waves have linear momentum,orbital angular momentum,and spin angular momentum.The orbital angular momentum carried via vortex beams has considerable application potential in contemporary optical technology and has important application value in the fields of classical communication,quantum communication,optical manipulation,and rotation detection.Recently,domestic and foreign researchers proposed various techniques for detecting beam orbital angular momentum,including diffraction grating,interferometry,Doppler analysis,and metasurface methods.Compared with other methods,the metasurface method has the advantages of high efficiency and strong light manipulation.This paper primarily introduces several methods for measuring beam orbital angular momentum using metasurfaces,as well as their research progress and development status.