Ultrafast control of vortex microlasers

Can Huang, Chen Zhang, Shumin Xiao, Yuhan Wang, Yubin Fan, Yilin Liu, Nan Zhang, Geyang Qu, Hongjun Ji, Jiecai Han, Li Ge, Yuri Kivshar, Qinghai Song*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    494 Citations (Scopus)


    The development of classical and quantum information-processing technology calls for on-chip integrated sources of structured light. Although integrated vortex microlasers have been previously demonstrated, they remain static and possess relatively high lasing thresholds, making them unsuitable for high-speed optical communication and computing. We introduce perovskite-based vortex microlasers and demonstrate their application to ultrafast all-optical switching at room temperature. By exploiting both mode symmetry and far-field properties, we reveal that the vortex beam lasing can be switched to linearly polarized beam lasing, or vice versa, with switching times of 1 to 1.5 picoseconds and energy consumption that is orders of magnitude lower than in previously demonstrated all-optical switching. Our results provide an approach that breaks the long-standing trade-off between low energy consumption and high-speed nanophotonics, introducing vortex microlasers that are switchable at terahertz frequencies.

    Original languageEnglish
    Pages (from-to)1018-1021
    Number of pages4
    Issue number6481
    Publication statusPublished - 28 Feb 2020


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