An RGB-Achromatic Aplanatic Metalens

IF 9.8 1区 物理与天体物理 Q1 OPTICS
Junhao Li, Wenwei Liu, Haofei Xu, Zhaorui Huang, Jian Wang, Jing Wen, Jia Yang, Jianguo Guan, Shuming Wang, Andrea Alù, Zhang-Kai Zhou, Shuqi Chen, Lin Chen
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引用次数: 0

Abstract

Optical metalenses offer a compact approach for the development of nanoscale optical devices with various imaging functionalities. Realizing high-quality images using metalenses with large numerical aperture (NA) requires eliminating unwanted optical aberrations. Existing strategies have largely focused only on correcting chromatic aberrations, and a metalens capable of simultaneously correcting chromatic and spherical aberrations has not yet been developed. Here, this issue is addresed by realizing an aplanatic phase profile for a red–green–blue (RGB) achromatic metalens, thereby demonstrating an RGB-achromatic aplanatic metalens. This device consists of crystalline silicon nanostructures and it enables RGB-achromatic aplanatic focusing with an NA of 0.635. The focal length of metalens remains unchanged at the three RGB wavelengths, whereas the associated focal spots are significantly smaller than those of an RGB-achromatic metalens with spherical aberrations. An enhanced RGB imaging resolution is demonstrated, offering exciting opportunities to power up various imaging and display applications using flat metalenses.

Abstract Image

一种 RGB 色平面金属传感器
光学金属透镜为开发具有各种成像功能的纳米级光学设备提供了一种紧凑的方法。使用大数值孔径(NA)金属透镜实现高质量图像需要消除不必要的光学像差。现有的策略大多只侧重于校正色差,而能够同时校正色差和球差的金属透镜尚未开发出来。本文通过实现红-绿-蓝(RGB)消色差金属膜的平面相位轮廓来解决这一问题,从而展示了 RGB-消色差平面金属膜。该装置由晶体硅纳米结构组成,可实现 RGB 全色平面聚焦,NA 值为 0.635。在三个 RGB 波长下,金属膜的焦距保持不变,而相关的焦斑则明显小于具有球面像差的 RGB 全色金属膜。RGB 成像分辨率的提高,为使用平面金属透镜的各种成像和显示应用提供了令人兴奋的机遇。
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来源期刊
CiteScore
14.20
自引率
5.50%
发文量
314
审稿时长
2 months
期刊介绍: Laser & Photonics Reviews is a reputable journal that publishes high-quality Reviews, original Research Articles, and Perspectives in the field of photonics and optics. It covers both theoretical and experimental aspects, including recent groundbreaking research, specific advancements, and innovative applications. As evidence of its impact and recognition, Laser & Photonics Reviews boasts a remarkable 2022 Impact Factor of 11.0, according to the Journal Citation Reports from Clarivate Analytics (2023). Moreover, it holds impressive rankings in the InCites Journal Citation Reports: in 2021, it was ranked 6th out of 101 in the field of Optics, 15th out of 161 in Applied Physics, and 12th out of 69 in Condensed Matter Physics. The journal uses the ISSN numbers 1863-8880 for print and 1863-8899 for online publications.
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