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Full-color enhanced second harmonic generation using rainbow trapping in ultrathin hyperbolic metamaterials

Author

Listed:
  • Junhao Li

    (Huazhong University of Science and Technology)

  • Guangwei Hu

    (National University of Singapore)

  • Lina Shi

    (Chinese Academy of Sciences)

  • Nan He

    (JORCEP, Zhejiang University)

  • Daqian Li

    (Huazhong University of Science and Technology)

  • Qiuyu Shang

    (Peking University)

  • Qing Zhang

    (Peking University)

  • Huange Fu

    (Huazhong University of Science and Technology)

  • Linlin Zhou

    (Huazhong University of Science and Technology)

  • Wei Xiong

    (Huazhong University of Science and Technology)

  • Jianguo Guan

    (Wuhan University of Technology)

  • Jian Wang

    (Huazhong University of Science and Technology)

  • Sailing He

    (JORCEP, Zhejiang University
    School of Electrical Engineering, Royal Institute of Technology)

  • Lin Chen

    (Huazhong University of Science and Technology)

Abstract

Metasurfaces have provided a promising approach to enhance the nonlinearity at subwavelength scale, but usually suffer from a narrow bandwidth as imposed by sharp resonant features. Here, we counterintuitively report a broadband, enhanced second-harmonic generation, in nanopatterned hyperbolic metamaterials. The nanopatterning allows the direct access of the mode with large momentum, rendering the rainbow light trapping, i.e. slow light in a broad frequency, and thus enhancing the local field intensity for boosted nonlinear light-matter interactions. For a proof-of-concept demonstration, we fabricated a nanostructured Au/ZnO multilayer, and enhanced second harmonic generation can be observed within the visible wavelength range (400-650 nm). The enhancement factor is over 50 within the wavelength range of 470-650 nm, and a maximum conversion efficiency of 1.13×10−6 is obtained with a pump power of only 8.80 mW. Our results herein offer an effective and robust approach towards the broadband metasurface-based nonlinear devices for various important technologies.

Suggested Citation

  • Junhao Li & Guangwei Hu & Lina Shi & Nan He & Daqian Li & Qiuyu Shang & Qing Zhang & Huange Fu & Linlin Zhou & Wei Xiong & Jianguo Guan & Jian Wang & Sailing He & Lin Chen, 2021. "Full-color enhanced second harmonic generation using rainbow trapping in ultrathin hyperbolic metamaterials," Nature Communications, Nature, vol. 12(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26818-3
    DOI: 10.1038/s41467-021-26818-3
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    References listed on IDEAS

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    1. Jongwon Lee & Mykhailo Tymchenko & Christos Argyropoulos & Pai-Yen Chen & Feng Lu & Frederic Demmerle & Gerhard Boehm & Markus-Christian Amann & Andrea Alù & Mikhail A. Belkin, 2014. "Giant nonlinear response from plasmonic metasurfaces coupled to intersubband transitions," Nature, Nature, vol. 511(7507), pages 65-69, July.
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