Full-Color Quasi-Achromatic Imaging with a Dual-Functional Metasurface

Achieving broadband achromaticity in the visible spectrum is critical for enhancing the imaging performance of metalenses. However, many previous studies remain constrained by small device sizes or small numerical aperture. In this study, we propose a polarization-multiplexed metalens capable of generating zero- and high-order Bessel beams to achieve quasi-achromatic correction without size limitations. An image subtraction method with the two polarization channels is developed to mitigate the Bessel beam sidelobes to improve imaging quality. Our results demonstrate an effective quasi-achromatic focusing and imaging over a continuous wavelength range of 450-700 nm with long focus depth. The image subtraction method significantly enhances the image clarity and contrast, providing new insights for full-color imaging and detection.

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Publication Details

Journal
Nano Letters
Published
2025-04-18
DOI
https://doi.org/10.1021/acs.nanolett.5c00695
Citations
9
Primary Topic
Metamaterials and Metasurfaces Applications
Type
article
Field-Weighted Citation Impact
3.85

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article

Full-Color Quasi-Achromatic Imaging with a Dual-Functional Metasurface

Jitao Ji, Wenjing Shen, Yanhao Chu, Xiaoyu Du et al.
9 citations
Nano Letters
Metamaterials and Metasurfaces Applications
3.85
article

Full-Color Quasi-Achromatic Imaging with a Dual-Functional Metasurface

Jitao Ji, Wenjing Shen, Yanhao Chu, Xiaoyu Du, Jian Li, Chen Chen, Tao Li, Junyi Wang, Shining N. Zhu, Jiacheng Sun
article en
9 citations

Abstract

Achieving broadband achromaticity in the visible spectrum is critical for enhancing the imaging performance of metalenses. However, many previous studies remain constrained by small device sizes or small numerical aperture. In this study, we propose a polarization-multiplexed metalens capable of generating zero- and high-order Bessel beams to achieve quasi-achromatic correction without size limitations. An image subtraction method with the two polarization channels is developed to mitigate the Bessel beam sidelobes to improve imaging quality. Our results demonstrate an effective quasi-achromatic focusing and imaging over a continuous wavelength range of 450-700 nm with long focus depth. The image subtraction method significantly enhances the image clarity and contrast, providing new insights for full-color imaging and detection.

Nano LettersVol. 25(20)
Collaborative Innovation Center of Advanced Microstructures (CN), National Laboratory of Solid State Microstructures, Nanjing University (CN)
National Natural Science Foundation of China, National Laboratory of Solid State Microstructures, Nanjing University, National Key Research and Development Program of China
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Openalex Percentile: Top 6%
Metamaterials and Metasurfaces Applications
3.85
DOISourceOpenAlex
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