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Experimental demonstration of a continuous varifocal metalens with large zoom range and high imaging resolution

文献类型：期刊论文

作者Guo, Yinghui1,2; Pu, Mingbo1,2; Ma, Xiaoliang1,2; Li, Xiong1,2; Shi, Ruoyu1,2; Luo, Xiangang1,2
刊名Applied Physics Letters
出版日期2019-10-14
卷号115期号:16
ISSN号0003-6951
DOI10.1063/1.5123367
文献子类期刊论文
英文摘要Varifocal lenses find significant applications in telescopy, photography, and microscopy. Conventionally, a varifocal lens is implemented by changing the axial distance between multiple conventional bulky refractive elements. Recent progress in metasurfaces offers an alternative based on ultrathin and lightweight metadevices, but suffering from a limited zoom range (typically no more than 2×) or numerical aperture (typically no more than 0.3). Here, we experimentally demonstrate a continuous varifocal metalens in the microwave band, which can be continuously zoomed by changing the mutual angle between two combined geometric metasurfaces with the same design. The results reveal that a 3.5× zoom range is realized when the mutual angle increases from 20° to 90°, with changes of the focal length from 295 mm to 85 mm and numerical aperture from 0.56 to 0.92. Furthermore, the diffraction-limited focusing and high imaging resolution are experimentally demonstrated. © 2019 Author(s).
WOS关键词LIQUID-CRYSTAL LENS ; FOCAL LENGTH ; METASURFACE ; HOLOGRAMS
WOS研究方向Physics, Applied
语种英语
WOS记录号WOS:000503750200029
出版者American Institute of Physics Inc.
源URL[http://ir.ioe.ac.cn/handle/181551/9669]  
专题光电技术研究所_微细加工光学技术国家重点实验室（开放室）
作者单位1.State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu; 610209, China;
2.School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100049, China
推荐引用方式
GB/T 7714		 Guo, Yinghui,Pu, Mingbo,Ma, Xiaoliang,et al. Experimental demonstration of a continuous varifocal metalens with large zoom range and high imaging resolution[J]. Applied Physics Letters,2019,115(16).
APA Guo, Yinghui,Pu, Mingbo,Ma, Xiaoliang,Li, Xiong,Shi, Ruoyu,&Luo, Xiangang.(2019).Experimental demonstration of a continuous varifocal metalens with large zoom range and high imaging resolution.Applied Physics Letters,115(16).
MLA Guo, Yinghui,et al."Experimental demonstration of a continuous varifocal metalens with large zoom range and high imaging resolution".Applied Physics Letters 115.16(2019).

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来源：光电技术研究所

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