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Showing 1–6 of 6 results
Advanced filters: Author: Xinbo Sha Clear advanced filters

  • The authors demonstrate an efficient way to generate high-purity vortex beams by applying optical neural networks to cascaded phase-only metasurfaces. Specifically, they present record-high-quality Laguerre-Gaussian (LGp,l) optical modes with polynomial orders p = 10 and l = 200 with purity in p, l and relative conversion efficiency of 96%, 85%, and 70%, respectively.

    • Feng Mei
    • Geyang Qu
    • Shumin Xiao
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-6

  • Chiral metasurfaces have been produced, with experimental observation of intrinsic chiral bound states in the continuum, which may lead to applications in chiral light sources and detectors, chiral sensing, valleytronics and asymmetric photocatalysis.

    • Yang Chen
    • Huachun Deng
    • Cheng-Wei Qiu
    Research
    Nature
    Volume: 613, P: 474-478

  • A metalaser is described, in which light can have an arbitrarily shaped wavefront, enabling the metalaser emission to have any desired profile, such as focal spots, focal lines, vector beams, vortex beams and even holograms.

    • Yixuan Zeng
    • Xinbo Sha
    • Qinghai Song
    Research
    Nature
    Volume: 643, P: 1240-1245

  • Nonlinear chiral light generation typically requires complex chiral structures. Here, authors demonstrate that a single achiral metasurface can generate third-harmonic light with arbitrarily tunable chirality, controlled simply by varying the polarization of the incident laser, and achieve ultrafast chirality switching in just 3.2 femtoseconds.

    • Fangxing Lai
    • Jun Yin
    • Qinghai Song
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-7

  • Achieving wide-gamut structural colours with brightness control is challenging. Here, the authors demonstrate colours beyond Rec.2020 and continuous, polarizer-free brightness tuning in dielectric metasurfaces via mode interference and diffraction control.

    • Yingjie Li
    • Jun Yin
    • Shumin Xiao
    ResearchOpen Access
    Nature Communications
    Volume: 17, P: 1-8