Directly generating vortex beams in the second harmonic by a spirally structured fundamental wave  

作　　者：Jun Li Haigang Liu Yan Li Xianping Wang Minghuang Sang Xianfeng Chen 李俊;刘海港;李妍;王贤平;桑明煌;陈险峰(School of Science and Technology,Jiangxi Normal University,Nanchang 330022,China;State Key Laboratory of Advanced Optical Communication Systems and Networks,School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China;Jiangxi Key Laboratory of Photoelectronics and Telecommunication,Department of Physics,Jiangxi Normal University,Nanchang 330022,China;Collaborative Innovation Center of Light Manipulations and Applications,Shandong Normal University,Jinan 250358,China)

机构地区：[1]School of Science and Technology,Jiangxi Normal University,Nanchang 330022,China [2]State Key Laboratory of Advanced Optical Communication Systems and Networks,School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China [3]Jiangxi Key Laboratory of Photoelectronics and Telecommunication,Department of Physics,Jiangxi Normal University,Nanchang 330022,China [4]Collaborative Innovation Center of Light Manipulations and Applications,Shandong Normal University,Jinan 250358,China

出　　处：《Chinese Optics Letters》2021年第6期18-22,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11864017,61765008,and 12064017);the Scientific and Technology Project of Jiangxi Provincial Education Department(No.GJJ161539);the Open Project of Key Laboratory of Photoelectronics and Communication of Jiangxi Province(No.2015005);the Open Project of Jiangxi Key Laboratory of Nanomaterials and Sensors(No.2017007);the Open Fund by State Key Laboratory of Advanced Optical Communication Systems and Networks(No.2017GZKF18);the Young Talent Development Plan of Jiangxi Normal University 2019。

摘　　要：Based on nonlinear wave mixing, we experimentally propose a scheme for directly generating optical orbital angular momentum(OAM) by a spirally structured fundamental wave interacting with a nonlinear medium, in which the nonlinear susceptibilities are homogenous. In the experiment, the second-harmonic generation of a fundamental wave carrying positive(negative) integers and fractional OAM states was investigated. This study presents a convenient approach for dynamic control of OAM of vortex beams, which may feature their applications in optical manipulation and optical communication.

关 键 词：vortex beams optical orbital angular momentum spirally structured fundamental wave 

分 类 号：O437[机械工程—光学工程]