Superimposition of topological charges between vortex beams and singular points of photonic crystal slabs

被引：0
|
作者：
Gao, Wenya [1 ]
Liu, Ziyi [1 ]
Li, Xiangning [1 ]
Wang, Xu [1 ]
Hu, Guanqu [1 ]
Ye, Weimin [2 ]
Guan, Chunying [1 ]
Liu, Jianlong [1 ]
机构：
[1] Harbin Engn Univ, Coll Phys & Optoelect Engn, Key Lab Infiber Integrated Opt, Minist Educ, Harbin 150001, Peoples R China
[2] Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2023年 / 56卷 / 27期
基金：
中国国家自然科学基金;
关键词：
bound state in the continuum; photonic crystal slab; vortex beam; PHASE; GENERATION;
D O I：
10.1088/1361-6463/acca2e
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The bound state in the continuum (BIC) is a singular point of polarization in the momentum space of a periodic structure. It has been demonstrated that vortex beams can be generated by utilizing the polarization vortex around BIC based on the geometric phase in momentum space. In this letter, we propose a reflective photonic crystal (PhC) to generate a vortex beam and demonstrate the superimposition of topological charges in the momentum space between PhC and the vortex beams. In addition to BICs, we demonstrate that other singularities like degenerate points can also be used to generate vortex beams.
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页数：7
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