Focusing characteristics of cylindrical vector beams through a multi-focal all-dielectric grating lens

被引：1

作者：

Chen, Mulin ^{[1
]}

Zhu, Congying ^{[1
]}

Huang, Haosi ^{[1
]}

Yang, Xinze ^{[1
]}

Wang, Jun ^{[1
]}

Chi, Tiantian ^{[1
]}

Liu, Ning ^{[1
]}

Lu, Yunqing ^{[1
]}

Zhang, Baifu ^{[2
]}

Xu, Ji ^{[1
]}

Liang, Zhongcheng ^{[1
]}

机构：

[1] Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Nanjing 210023, Peoples R China

[2] Nanjing Univ Sci & Technol, Sch Elect & Opt Engn, Nanjing 210094, Peoples R China

来源：

OPTICS LETTERS | 2022年 / 47卷 / 02期

基金：

中国国家自然科学基金;

关键词：

NEGATIVE REFRACTION; MODULATION;

D O I：

10.1364/OL.448313

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A novel, to the best of our knowledge, type of multi-focal all-dielectric grating lens is proposed in this work, and focusing characteristics of cylindrical vector beams through the lens are investigated in detail. Based on the negative refraction mechanism of negative-first-order diffraction and Fermat's principle, a multi-focal lens is designed. By analyzing the diffraction effect of the grating, the essential factor that affects the focus quality is found. Through a two-step optimization process, secondary foci and the focal displacement of primary foci caused by high-order diffractions are overcome, and the quality of the focal field is significantly improved. This work provides a reference for micro-lens design for focus modulation, and the research results also have potential applications in the fields of light-field manipulation and optical tweezers. (C) 2022 Optica Publishing Group

引用

页码：253 / 256

页数：4

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