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太赫兹近场涡旋光束的干涉

Interference of Near-Field Terahertz Vortex Beams

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摘要

设计了一种近场涡旋光束干涉的微结构阵列。在该阵列中, 一对正交排列的矩形小孔构成阿基米德螺旋线。在线偏振太赫兹波的激励下, 其左旋和右旋分量分别形成具有异号拓扑荷数的近场涡旋光束, 并叠加产生新的电场分布。数值仿真结果表明, 通过调控每个矩形小孔的角度和螺旋线的螺距, 可实现任意拓扑荷数的正交涡旋光束的电场叠加。

Abstract

A microstructural array to generate the interference of near-field vortex beams is designed, in which an Archimedean spiral line is formed by a pair of orthogonally arranged rectangular holes. Upon the excitation of a linearly polarized terahertz beam, the near field vortex beams with different topological charge numbers are formed by their left-handed and right-handed components and superimposed to generate a new field distribution. The numerical simulation results show that the field superposition of orthogonal vortex beams with arbitrary topological charge numbers can be achieved by the adjustments of the angle of each rectangular hole and the pitch of the helix.

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中图分类号:O436.1

DOI:10.3788/cjl201946.0114001

所属栏目:太赫兹技术

基金项目:上海市自然科学基金(18ZR1425600)

收稿日期:2018-06-22

修改稿日期:2018-08-13

网络出版日期:2018-09-05

作者单位    点击查看

茅晨曦:上海理工大学上海市现代光学系统重点实验室, 上海 200093上海理工大学光电信息与计算机工程学院, 上海 200093
臧小飞:上海理工大学上海市现代光学系统重点实验室, 上海 200093上海理工大学光电信息与计算机工程学院, 上海 200093
朱亦鸣:上海理工大学上海市现代光学系统重点实验室, 上海 200093上海理工大学光电信息与计算机工程学院, 上海 200093

联系人作者:臧小飞(xfzang@usst.edu.cn)

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引用该论文

Mao Chenxi,Zang Xiaofei,Zhu Yiming. Interference of Near-Field Terahertz Vortex Beams[J]. Chinese Journal of Lasers, 2019, 46(1): 0114001

茅晨曦,臧小飞,朱亦鸣. 太赫兹近场涡旋光束的干涉[J]. 中国激光, 2019, 46(1): 0114001

被引情况

【1】张琦,吴强,张斌,潘崇佩,王日德,卢瑶,齐继伟,许京军. 铌酸锂芯片上的太赫兹集成和时空超分辨成像. 中国激光, 2019, 46(5): 508003--1

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