Near-infrared metalens for high-resolution and deep focus optical coherence tomography
Near-infrared metalens for high-resolution and deep focus optical coherence tomography
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DOI：
10.1063/5.0131170
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发表时间：
2022-12
期刊：
影响因子：
1.6
通讯作者：
M. Haerinia;B. Zheng;Aaron Hutchins;H. Tang;Hang Li;Yunxi Dong;Wei Guo;Hualiang Zhang
中科院分区：
文献类型：
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作者：
M. Haerinia;B. Zheng;Aaron Hutchins;H. Tang;Hang Li;Yunxi Dong;Wei Guo;Hualiang Zhang
高分辨率内窥镜光学成像是生物成像中检查内部器官的关键技术。在此类应用中，横向分辨率和焦深之间需要权衡。传统的光学相干断层扫描提供了更大的深度范围，但达不到所需的分辨率。超透镜更高分辨率和更大成像焦深的结合可以提高内窥镜光学成像的临床实用性。在这项工作中，我们设计、分析和制造了在 1300 nm 下工作的 500 µm 直径超透镜，以实现高分辨率和大成像焦深，从而满足了这一需求。所提出的超透镜的半高全宽和焦深分别为 3.10 和 286 µm。
High-resolution endoscopic optical imaging is a crucial technique in biological imaging to examine the inside organs. There is a trade-off between lateral resolution and depth of focus in such applications. Traditional Optical Coherence Tomography provides an increased depth range but falls short of desired resolution. The combination of both higher resolution and larger imaging depth of focus of metalens can improve the clinical utility of endoscopic optical imaging. In this work, we designed, analyzed, and fabricated a 500 µm diameter metalens operating at 1300 nm to achieve high resolution and large imaging depth of focus, therefore, addressing this need. The full width at half maximum and depth of focus for the proposed metalens are 3.10 and 286 µm, respectively.