Wei Heming, Hu Wenchen, Hu Jingtian, He Guoqiang, Pang Fufei, Krishnaswamy Sridhar, Nedoma Jan, Marques Carlos
Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai 200444, China.
Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System, Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems, Harbin Institute of Technology, Shenzhen, China.
iScience. 2025 May 11;28(6):112628. doi: 10.1016/j.isci.2025.112628. eCollection 2025 Jun 20.
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.
传统光学菲涅耳微透镜存在诸多局限性，如尺寸较大、成像光学质量有限，以及在高数值孔径消色差透镜中聚焦效率较低。相比之下，超构透镜依靠其亚波长结构来调制相位分布，从而实现更小的体积和卓越的聚焦性能。在这项工作中，我们通过双光子聚合技术的直接激光写入，逆向设计并制造了一种具有高数值孔径和宽波长范围的消色差超构透镜。该超构透镜焦距为19μm，厚度为3.6μm，数值孔径为0.8，在工作波长下平均聚焦效率为53.6%，平均半高宽为1.27μm。在1510nm - 1610nm带宽范围内，测得的平均聚焦效率为50.4%。所展示的这项工作证明了3D打印和逆向设计在实现航空航天领域功能性超构器件方面的巨大潜力。
