3D printed near-infrared high-numerical aperture achromatic metalens

IF 4.6 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

iScience Pub Date : 2025-05-11 DOI:10.1016/j.isci.2025.112628

Heming Wei , Wenchen Hu , Jingtian Hu , Guoqiang He , Fufei Pang , Sridhar Krishnaswamy , Jan Nedoma , Carlos Marques

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Abstract

Traditional optical Fresnel microlenses have limitations such as large size, limited optical quality for imaging, and low focusing efficiency in achromatic lenses with high NA. In contrast, metalenses rely on their subwavelength structure to modulate the phase distribution, resulting in smaller volumes and superior focusing performance. In this work, we inverse designed and fabricated an achromatic metalens with high-NA and broad wavelength range through direct laser writing using the two-photon polymerization technique. With a focal length of 19 μm, a thickness of 3.6 μm, and a numerical aperture of 0.8, the metalens exhibits an average focusing efficiency of 53.6% and an average half maximum width of 1.27 μm at the working wavelength. The measured average focusing efficiency is 50.4% within the bandwidth range of 1510 nm–1610 nm. The presented work demonstrates the great potential of 3D printing and inverse design for realizing functional meta-devices for aerospace sector.

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3D打印近红外高数值孔径消色差超构透镜

传统光学菲涅耳微透镜存在尺寸大、成像光学质量受限、高NA消色差透镜聚焦效率低等局限性。相比之下，超透镜依靠其亚波长结构来调制相位分布，从而产生更小的体积和更好的聚焦性能。本文利用双光子聚合技术，通过直接激光写入技术，逆向设计并制备了具有高na和宽波长范围的消色差超构透镜。该超构透镜的焦距为19 μm，厚度为3.6 μm，数值孔径为0.8，在工作波长处平均聚焦效率为53.6%，平均半最大宽度为1.27 μm。在1510 nm ~ 1610 nm带宽范围内，平均聚焦效率为50.4%。本文展示了3D打印和逆设计在实现航空航天领域功能元器件方面的巨大潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

iScience Multidisciplinary-Multidisciplinary

CiteScore

7.20

自引率

1.70%

发文量

1972

审稿时长

6 weeks

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