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High-efficiency broadband achromatic metalens for near-IR biological imaging window

Author

Listed:
  • Yujie Wang

    (Harbin Institute of Technology (Shenzhen))

  • Qinmiao Chen

    (Harbin Institute of Technology (Shenzhen))

  • Wenhong Yang

    (Harbin Institute of Technology (Shenzhen))

  • Ziheng Ji

    (Harbin Institute of Technology (Shenzhen))

  • Limin Jin

    (Harbin Institute of Technology (Shenzhen))

  • Xing Ma

    (Harbin Institute of Technology (Shenzhen))

  • Qinghai Song

    (Harbin Institute of Technology (Shenzhen))

  • Alexandra Boltasseva

    (Purdue University)

  • Jiecai Han

    (Harbin Institute of Technology)

  • Vladimir M. Shalaev

    (Purdue University)

  • Shumin Xiao

    (Harbin Institute of Technology (Shenzhen)
    Harbin Institute of Technology
    Shanxi University)

Abstract

Over the past years, broadband achromatic metalenses have been intensively studied due to their great potential for applications in consumer and industry products. Even though significant progress has been made, the efficiency of technologically relevant silicon metalenses is limited by the intrinsic material loss above the bandgap. In turn, the recently proposed achromatic metalens utilizing transparent, high-index materials such as titanium dioxide has been restricted by the small thickness and showed relatively low focusing efficiency at longer wavelengths. Consequently, metalens-based optical imaging in the biological transparency window has so far been severely limited. Herein, we experimentally demonstrate a polarization-insensitive, broadband titanium dioxide achromatic metalens for applications in the near-infrared biological imaging. A large-scale fabrication technology has been developed to produce titanium dioxide nanopillars with record-high aspect ratios featuring pillar heights of 1.5 µm and ~90° vertical sidewalls. The demonstrated metalens exhibits dramatically increased group delay range, and the spectral range of achromatism is substantially extended to the wavelength range of 650–1000 nm with an average efficiency of 77.1%–88.5% and a numerical aperture of 0.24–0.1. This research paves a solid step towards practical applications of flat photonics.

Suggested Citation

  • Yujie Wang & Qinmiao Chen & Wenhong Yang & Ziheng Ji & Limin Jin & Xing Ma & Qinghai Song & Alexandra Boltasseva & Jiecai Han & Vladimir M. Shalaev & Shumin Xiao, 2021. "High-efficiency broadband achromatic metalens for near-IR biological imaging window," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
  • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-25797-9
    DOI: 10.1038/s41467-021-25797-9
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    Cited by:

    1. Yueqiang Hu & Yuting Jiang & Yi Zhang & Xing Yang & Xiangnian Ou & Ling Li & Xianghong Kong & Xingsi Liu & Cheng-Wei Qiu & Huigao Duan, 2023. "Asymptotic dispersion engineering for ultra-broadband meta-optics," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Jin Yao & Fangxing Lai & Yubin Fan & Yuhan Wang & Shih-Hsiu Huang & Borui Leng & Yao Liang & Rong Lin & Shufan Chen & Mu Ku Chen & Pin Chieh Wu & Shumin Xiao & Din Ping Tsai, 2024. "Nonlocal meta-lens with Huygens’ bound states in the continuum," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    3. Zhipeng Yu & Huanhao Li & Wannian Zhao & Po-Sheng Huang & Yu-Tsung Lin & Jing Yao & Wenzhao Li & Qi Zhao & Pin Chieh Wu & Bo Li & Patrice Genevet & Qinghua Song & Puxiang Lai, 2024. "High-security learning-based optical encryption assisted by disordered metasurface," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    4. Corey A. Richards & Christian R. Ocier & Dajie Xie & Haibo Gao & Taylor Robertson & Lynford L. Goddard & Rasmus E. Christiansen & David G. Cahill & Paul V. Braun, 2023. "Hybrid achromatic microlenses with high numerical apertures and focusing efficiencies across the visible," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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