Measuring the topological charge of terahertz vortex beams with a focal hyperbolic lens

被引：13

作者：

Yang, Yongqiang ^{[1
]}

Niu, Liting ^{[1
]}

Yang, Zhenggang ^{[2
]}

Liu, Jinsong ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Natl Lab Optoelect, Wuhan 430074, Peoples R China

[2] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China

来源：

APPLIED OPTICS | 2020年 / 59卷 / 15期

基金：

中国国家自然科学基金;

关键词：

ORBITAL ANGULAR-MOMENTUM; OPTICAL VORTEX; GENERATION; LIGHT; TRANSFORMATION; VORTICES;

D O I：

10.1364/AO.388111

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An efficient method is proposed to measure the topological charge (TC) of terahertz (THz) vortex beams with a focal hyperbolic (FH) lens at 0.1 THz. The FH lens is designed and fabricated by 3D printing. The diffraction fringes acquired in the focal plane of the FH lens can judge the number and sign of the TC. Furthermore, after the horizontal or vertical measurement curve is recorded by rotating the FH lens to a suitable angle, the TC value can then be simply and effectively identified. The TC value of the experiment measurement reaches 5. The experiment results are in excellent accord with the simulation. (C) 2020 Optical Society of America

引用

页码：4685 / 4691

页数：7

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