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Showing 1–10 of 10 results
Advanced filters: Author: Geyang Qu 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

  • Broadband achromatic metalenses hold promise for enabling high-performance optical imaging in a compact form factor. Here, the authors report the realization of high-efficiency Si3N4 achromatic metalenses in the visible range and demonstrate their integration onto a commercial imaging chip.

    • Yao Zhang
    • Xiong Jiang
    • Shumin Xiao
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-8

  • A metasurface consisting of merely four nanopillars at the wavelength scale is sufficient to generate a high-quality vortex beam.

    • Qinmiao Chen
    • Geyang Qu
    • Shumin Xiao
    Research
    Nature Nanotechnology
    Volume: 19, P: 1000-1006

  • Integration of III-V semiconductor microlasers into modern Si or Si3N4 based photonic integrated circuits remains a challenge. Here, the authors demonstrate a perovskite vortex microlaser with highly directional outputs and well-controlled topological charges that is highly compatible with most materials.

    • Wenzhao Sun
    • Yilin Liu
    • Shumin Xiao
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-7

  • Here, the authors demonstrate a re-programmable metasurface that can produce arbitrary holographic images for optical encryption. The encrypted information is divided into two matrices and defined to the incident laser to produce arbitrary holographic images.

    • Geyang Qu
    • Wenhong Yang
    • Shumin Xiao
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-5

  • 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

  • Employing a miniaturized spectrometer that combines a metasurface-based spectrometer array and a metalens, angle-resolved spectral imaging is achieved with a wavelength accuracy of 0.17 nm, spectral resolution of 0.40 nm and angular resolution of 4.88 × 10−3 rad for a spectrometer with a 4 × 4 μm2 footprint.

    • Guiyi Cai
    • Yanhao Li
    • Qinghai Song
    Research
    Nature Materials
    Volume: 23, P: 71-78

  • A special type of laser enables precise and continuous tuning of spatial coherence, suppressing the coherent artifacts (i) of a meta-hologram while maintaining image sharpness, emission spectrum and power (ii).

    • Yaniv Eliezer
    • Geyang Qu
    • Hui Cao
    ResearchOpen Access
    Light: Science & Applications
    Volume: 10, P: 1-11