Electromagnetic focusing by zero orbital angular momentum system

被引：1

作者：

Sun, Zhiwei ^{[1
]}

Jiang, Lizhong ^{[2
]}

Liu, Run ^{[1
]}

Du, Mingzhu ^{[3
]}

Cao, Hailin ^{[1
]}

机构：

[1] Chongqing Univ, Sch Microelect & Commun Engn, Chongqing 400044, Peoples R China

[2] Shanghai Acad Spaceflight Technol, Shanghai Radio Equipment Res Inst, Shanghai 201109, Peoples R China

[3] Nanjing Univ, Sch Elect Sci & Engn, Nanjing 210023, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2021年 / 119卷 / 18期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

LIGHT;

D O I：

10.1063/5.0071574

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the observation of the electromagnetic focusing effect of zero orbital angular momentum (OAM) after introducing the multi-grade OAM concept. It performs the same feature in the central area around the focal point, while the typical Airy disk is transformed into a vortical cloud pattern beside the central area. Quantized focusing phenomena are exhibited based on the periodicity of the OAM. These results were verified by simulation and experiments. Our method achieves an optical focusing theory through OAM manipulation, which can be applied in imaging, photoetching, and communication. Furthermore, it also provides an opportunity for energy harvesting from natural OAM materials.

引用

页数：6

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