From Local to Nonlocal High- Q Plasmonic Metasurfaces

作者：Yao Liang, Din Ping Tsai, Yuri S. Kivshar · 发表于：Physical Review Letters · 年份：2024 · DOI：10.1103/physrevlett.133.053801 · 被引用次数：217 · 研究领域：Plasmonic and Surface Plasmon Research、Metamaterials and Metasurfaces Applications、Orbital Angular Momentum in Optics

The physics of bound states in the continuum (BICs) allows the design and demonstration of optical resonant structures with large values of the quality factor (Q factor) by employing dielectric structures with low losses. However, BIC is a general wave phenomenon that should be observed in many systems, including the metal-dielectric structures supporting surface plasmon polaritons where optical resonances are hindered by losses. Here we suggest and develop a comprehensive strategy to achieve high-Q resonances in plasmonic metasurfaces by effectively tailoring the resonant modes from local to nonlocal regimes, thus transitioning from quasi-isolated localized resonances to extended resonant modes involving strong interaction among neighboring structure metaunits.