数字微镜装置
制作
材料科学
光学
全息术
激光器
光子学
光电子学
微透镜
数字全息术
镜头(地质)
物理
医学
替代医学
病理
作者
Kaiwen Jie,Zhuofan Yao,Yiyin Zheng,Minghui Wang,Diefeng Yuan,Zeda Lin,Shantong Chen,Fei Qin,Huase Ou,Xiangping Li,Yaoyu Cao
出处
期刊:Optics Letters
[Optica Publishing Group]
日期:2024-05-15
卷期号:49 (12): 3288-3288
摘要
The 3D structured light field manipulated by a digital-micromirror-device (DMD)-based digital hologram has demonstrated its superiority in fast-fabricating stereo nanostructures. However, this technique intrinsically suffers from defects of light intensity in generating modulated focal spots, which prevents from achieving high-precision micro/nanodevices. In this Letter, we have demonstrated a compensation approach based on adapting spatial voxel density for fabricating optical metalenses with ultrahigh precision. The modulated focal spot experiences intensity fluctuations of up to 3% by changing the spatial position, leading to a 20% variation of the structural dimension in fabrication. By altering the voxel density to improve the uniformity of the laser cumulative exposure dosage over the fabrication region, we achieved an increased dimensional uniformity from 94.4% to 97.6% in fabricated pillars. This approach enables fast fabrication of metalenses capable of sub-diffraction focusing of 0.44λ/NA with the increased mainlobe–sidelobe ratio from 1:0.34 to 1:0.14. A 6 × 5 supercritical lens array is fabricated within 2 min, paving a way for the fast fabrication of large-scale photonic devices.
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