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  • Received: Apr. 2, 2020

    Accepted: Jun. 23, 2020

    Posted: Jul. 16, 2020

    Published Online: Jul. 17, 2020

    The Author Email: Shuming Wang (wangshuming@nju.edu.cn), Zhenlin Wang (zlwang@nju.edu.cn), Shining Zhu (zhusn@nju.edu.cn)

    DOI: 10.3788/COL202018.082401

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    Lin Li, Quan Yuan, Run Chen, Xiujuan Zou, Wenbo Zang, Tianyue Li, Gaige Zheng, Shuming Wang, Zhenlin Wang, Shining Zhu. Chromatic dispersion manipulation based on metasurface devices in the mid-infrared region[J]. Chinese Optics Letters, 2020, 18(8): 082401

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Chinese Optics Letters, Vol. 18, Issue 8, 082401 (2020)

Chromatic dispersion manipulation based on metasurface devices in the mid-infrared region

Lin Li1, Quan Yuan1, Run Chen1, Xiujuan Zou1, Wenbo Zang1, Tianyue Li1, Gaige Zheng1, Shuming Wang1,2,*, Zhenlin Wang1,**, and Shining Zhu1,2,***

Author Affiliations

  • 1National Laboratory of Solid State Microstructures, School of Physics, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
  • 2Key Laboratory of Intelligent Optical Sensing and Manipulation, Ministry of Education, Nanjing 210093, China

Abstract

The chromatic aberration of metasurfaces limits their application. How to cancel or utilize the large chromatic dispersion of metasurfaces becomes an important issue. Here, we design Si-based metasurfaces to realize flexible chromatic dispersion manipulation in mid-infrared region. We demonstrate the broadband achromatic metalens and achromatic gradient metasurface to cancel the chromatic aberration over a continuous bandwidth (8–12 μm). In contrast, the metalens and gradient metasurface with enhanced chromatic dispersion have also been realized, where the focal length and deflection angle with different wavelengths vary more significantly than the conventional devices designed with geometric phase. These demonstrations indicate promising potential applications.

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