Nonlinear imaging through magnetic dipole quasi-BIC ultra-thin resonators

Lei Xu*, Khosro Zangeneh Kamali, Lujun Huang, Mohsen Rahmani, Alexander Smirnov, Rocio Camacho-Morales, Yixuan Ma, Guoquan Zhang, Matt Woolley, Dragomir N. Neshev, Andrey E. Miroshnichenko

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    We propose an ultra-thin silicon metasurface supporting a high-quality leaky mode which is formed by partially breaking a bound-state-in-the-continuum (BIC) generated by the collective magnetic dipole (MD) resonance excited in the subdiffractive periodic systems. Such a quasi-BIC MD state leads to a robust near-field enhancement and a significant boost of the nonlinear process, resulting in measured 500-fold enhancement of third-harmonic emission in comparison to the conventional silicon disk metasurface. We further experimentally demonstrate the highly-efficient nonlinear image tuning via polarisation and wavelength control, opening the way for various applications in high-performance nonlinear metadevices including tunable laser, tunable displays, nonlinear imaging.

    Original languageEnglish
    Title of host publicationSPIE Micro + Nano Materials, Devices, and Applications 2019
    EditorsM. Cather Simpson, Saulius Juodkazis
    PublisherSPIE
    ISBN (Electronic)9781510631427
    DOIs
    Publication statusPublished - 2019
    EventSPIE Micro + Nano Materials, Devices, and Applications 2019 - Melbourne, Australia
    Duration: 9 Dec 201912 Dec 2019

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume11201
    ISSN (Print)0277-786X
    ISSN (Electronic)1996-756X

    Conference

    ConferenceSPIE Micro + Nano Materials, Devices, and Applications 2019
    Country/TerritoryAustralia
    CityMelbourne
    Period9/12/1912/12/19

    Fingerprint

    Dive into the research topics of 'Nonlinear imaging through magnetic dipole quasi-BIC ultra-thin resonators'. Together they form a unique fingerprint.

    Cite this