光学
材料科学
多模光纤
光纤
数值孔径
包层(金属加工)
单模光纤
光电子学
光纤传感器
物理
波长
冶金
作者
Yin Liu,Qiming Liao,Yongtian Wang,Xiaowei Li,Lingling Huang
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-02-23
卷期号:48 (7): 1742-1742
被引量:4
摘要
Conventional optical fibers have good light conduction and transmission properties, and have been widely used in the fields of long-distance fiber-optic communication and sensing. However, due to the dielectric properties of the fiber core and cladding materials, the spot size of the transmitted light is dispersive, which greatly limits the application areas of optical fiber. The emergence of metalenses based on artificial periodic micro-nanostructures is opening the door to a variety of fiber innovations. We demonstrate an ultracompact beam-focusing fiber-optic device based on a composite structure of a single-mode fiber (SMF), a multimode fiber (MMF), and a metalens consisting of periodic micro-nano silicon column structures. Convergent beams with numerical apertures (NAs) of up to 0.64@air and a focal length of 63.6 μm are produced by the metalens on the MMF end face. The metalens-based fiber-optic beam-focusing device could find new applications in optical imaging, particle capture and manipulation, sensing, and fiber lasers.
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