Directly generating orbital angular momentum in second-harmonic waves with a spirally poled nonlinear photonic crystal

被引：31
|
作者：
Wei, Dunzhao [1 ,2 ]
Zhu, Yunzhi [1 ,2 ]
Zhong, Weihao [1 ,2 ]
Cui, Guoxin [1 ,2 ]
Wang, Huijun [1 ,2 ]
He, Ying [1 ,2 ]
Zhang, Yong [1 ,2 ]
Lu, Yanqing [1 ,2 ]
Xiao, Min [1 ,2 ,3 ]
机构：
[1] Nanjing Univ, Coll Engn & Appl Sci, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[2] Nanjing Univ, Sch Phys, Nanjing 210093, Jiangsu, Peoples R China
[3] Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA
来源：
APPLIED PHYSICS LETTERS | 2017年 / 110卷 / 26期
基金：
中国国家自然科学基金;
关键词：
BEAM GENERATION; LITAO3; CRYSTAL; LIGHT; MANIPULATION; SINGLE;
D O I：
10.1063/1.4990527
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Based on nonlinear holography, we propose a 2D spirally poled LiNbO3 nonlinear photonic crystal that generates orbital angular momentum (OAM) states of second-harmonic (SH) waves. In this crystal, the generated SH waves from positive and negative domains have a pi phase difference, which is used to compose a nonlinear Fresnel zone plate for an experimental demonstration of generating SH OAM states at the designed focusing spot. In addition, the crystal can be used to detect input OAM states of fundamental beams without significantly disturbing their wave fronts. Published by AIP Publishing.
引用
收藏
页数：4
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