An RGB-Achromatic Aplanatic Metalens

IF 11.3 1区化学 Q1 CHEMISTRY, PHYSICAL

ACS Catalysis Pub Date : 2024-03-07 DOI:10.1002/lpor.202300729

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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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.

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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

ACS Catalysis CHEMISTRY, PHYSICAL-

CiteScore

20.80

自引率

6.20%

发文量

1253

审稿时长

1.5 months

期刊介绍： ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels. The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.