The demand for achromatic ultrathin flat lenses has become increasingly stringent, particularly for high‐performance imaging and display applications. Despite significant progress in achromatic metasurface and diffraction lenses, no single material has yet been capable of constructing ultrathin achromatic flat lenses covering ultrabroad wavebands, including the visible and near‐infrared (NIR), due to the limitations of material bandgaps. This limitation complicates fabrication processes, integration, and miniaturization, often leading to instability. In this paper, making use of the dispersionless nature of graphene, high numerical aperture multi‐wavelength achromatic metalenses (MAGLs) made entirely from graphene is proposed and demonstrated. This approach, based on a partial intensity resonance (PIR) mechanism, requires no iterative algorithms. Two MAGLs for visible and communication bands, respectively, are designed and fabricated. Remarkably, the measured focal lengths only deviate by less than 0.15% from the desired values. The graphene metalens (GML) in the visible produced clear and high‐quality images of microscopic character and Brassica napus cells. The demonstrated MAGLs significantly simplify the fabrication process and enhance integration, miniaturization, and stability. Their unique single‐material design offers tremendous potential to replace conventional refractive lenses in applications such as virtual reality glasses, hyperspectral imaging systems, and fluorescence microscopes.

中文翻译：

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用于可见光、NIR 等的多波长消色差石墨烯超透镜


对消色差超薄平面透镜的需求越来越严格，尤其是高性能成像和显示应用。尽管消色差超表面和衍射透镜取得了重大进展，但由于材料带隙的限制，还没有一种材料能够构建覆盖超宽波段（包括可见光和近红外 （NIR））的超薄消色差平面透镜。这种限制使制造工艺、集成和小型化复杂化，通常会导致不稳定。在本文中，利用石墨烯的无色散特性，提出并演示了完全由石墨烯制成的高数值孔径多波长消色差超透镜 （MAGLs）。这种方法基于部分强度谐振 （PIR） 机制，不需要迭代算法。设计并制造了两个分别用于可见光和通信频段的 MAGL。值得注意的是，测得的焦距与所需值的偏差仅小于 0.15%。可见光中的石墨烯超透镜 （GML） 可产生微观特征和甘蓝型油菜细胞的清晰和高质量图像。所展示的 MAGL 显著简化了制造工艺，并增强了集成度、小型化和稳定性。其独特的单一材料设计为在虚拟现实眼镜、高光谱成像系统和荧光显微镜等应用中取代传统折射镜片提供了巨大的潜力。