Generation of achromatic auto-focusing Airy beam for visible light by an all-dielectric metasurface

被引：6

作者：

Zhang, Song ^{[1
,2
]}

Huo, Pengcheng ^{[1
,2
]}

Wang, Yilin ^{[1
,2
]}

Li, Moxin ^{[3
,4
]}

Zhang, Cheng ^{[3
,4
,5
]}

Xu, Ting ^{[1
,2
]}

机构：

[1] Nanjing Univ, Coll Engn & Appl Sci, Natl Lab Solid State Microstruct, Nanjing, Peoples R China

[2] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing, Peoples R China

[3] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan, Peoples R China

[4] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan, Peoples R China

[5] Opt Valley Lab, Wuhan 430074, Hubei, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2022年 / 131卷 / 04期

基金：

中国国家自然科学基金;

关键词：

PHASE; PLASMON;

D O I：

10.1063/5.0077930

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The focusing performance of optical beams has always played an important role in various applications such as imaging, displaying, and sensing. In contrast to a traditional focused beam with gradually increasing light intensity, an auto-focusing Airy beam exhibits an abrupt way of focusing light energy. However, owning to the chromatic dispersion of light, the previously demonstrated auto-focusing Airy beam always suffers from chromatic aberration. Here, we show that with judicious dispersion engineering of its constituent nanostructures, a metasurface can generate auto-focusing Airy beam without chromatism for the visible light. In experimental demonstration, we implement a dielectric metasurface composed of TiO2 nanopillars that generates an achromatic auto-focusing Airy beam with diffraction-limited performance covering the wavelength range from 450 to 600nm. This study paves the way toward efficient achromatic auto-focusing Airy beam generation based on flat optical components, enabling diverse potential applications including biomedical imaging, light-sheet microscopy, and particle manipulation. Published under an exclusive license by AIP Publishing.

引用

页数：7