Angular momentum modulation of vortex Cherenkov radiation in optical waveguides

被引：0
|
作者：
Wang, Yehan [1 ,2 ]
Li, Wenjia [1 ,2 ]
Xu, Wenxia [1 ,2 ]
Zheng, Kaihao
Jiang, Zhaoqi [1 ,2 ]
Zhou, Hao [1 ]
Qin, Chunhua [1 ,2 ]
Guan, Chunying [1 ,2 ]
Liu, Jianlong [1 ,2 ]
Shi, Jinhui [2 ]
机构：
[1] Harbin Engn Univ, Coll Phys & Optoelect Engn, Key Lab Photon Mat & Devices Phys Ocean Applicat, Minist Ind & Informat Technol China, Harbin 150001, Peoples R China
[2] Harbin Engn Univ, Coll Phys & Optoelect Engn, Key Lab Infiber Integrated Opt, Minist Educ, Harbin 150001, Peoples R China
来源：
OPTICS EXPRESS | 2024年 / 32卷 / 16期
基金：
中国国家自然科学基金;
关键词：
SMITH-PURCELL RADIATION;
D O I：
10.1364/OE.525343
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Vortex free-electron radiation has attracted considerable interest because of its promising potential for applications in communication, high-density radiation sources, and particle detection. Here, we reveal angular momentum modulation of vortex Cherenkov radiation using subwavelength silicon waveguides. The topological charge of vortex radiation field can be controlled by the position parameters of two electron beams based on the rotational symmetry. Besides, the spin angular momentum is accompanied by the excited orbital angular momentum due to the spin-orbit interaction of light. In particular, the periodic evolution of spin and orbital angular momenta are demonstrated by breaking the symmetry of the waveguide. Our results provide a novel mechanism for flexibly regulating vortex electron radiation and exploring electro-optical interaction. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
引用
收藏
页码：27196 / 27205
页数：10
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