4.8 Article

Plasmonic bound states in the continuum to tailor light-matter coupling

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SCIENCE ADVANCES
卷 8, 期 49, 页码 -

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AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.add4816

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资金

  1. Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [EXC 2089/1-390776260]
  2. Bavarian program Solar Energies Go Hybrid (SolTech)
  3. Center for NanoScience (CeNS)
  4. Emmy Noether Program of the DFG [TI 1063/1]
  5. Australian Research Council [DE220101085, DP200101168, DP210101292]
  6. Deutsche Forschungsgemeinschaft [MA 4699/7-1]
  7. EPSRC Catalytics plasmonics programme [EP/W017075/1]
  8. Lee-Lucas Chair in Physics
  9. Australian Research Council [DE220101085] Funding Source: Australian Research Council

向作者/读者索取更多资源

Researchers have designed and successfully fabricated plasmonic nanofin metasurfaces, which play a crucial role in nanophotonics. By manipulating the geometric parameters, they achieved high-quality factor modes and demonstrated powerful performance in molecular sensing. The precise control of light-matter interactions is essential in this study. This research provides a new approach for enhancing light-matter interactions in various applications.
Plasmon resonances play a pivotal role in enhancing light-matter interactions in nanophotonics, but their low-quality factors have hindered applications demanding high spectral selectivity. Here, we demonstrate the design and 3D laser nanoprinting of plasmonic nanofin metasurfaces, which support symmetry-protected bound states in the continuum up to the fourth order. By breaking the nanofins' out-of-plane symmetry in parameter space, we achieve high-quality factor (up to 180) modes under normal incidence. The out-of-plane symmetry breaking can be fine-tuned by the nanofins' triangle angle, opening a pathway to precisely control the ratio of radiative to intrinsic losses. This enables access to the under-, critical, and over-coupled regimes, which we exploit for pixelated molecular sensing. We observe a strong dependence of the sensing performance on the coupling regime, demonstrating the importance of judicious tailoring of light-matter interactions. Our demonstration provides a metasurface platform for enhanced light-matter interaction with a wide range of applications.

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