Dehbi Lynda, Kartikey Pandey, Braik Macilia, Belkhir Abderrahmane, Lau-Truong Stéphanie, Gam-Derouich Sarra, Chevillot-Biraud Alexandre, Mangeney Claire, Mezeghrane Abdelaziz, Baida Fadi Issam, Felidj Nordin
Université Mouloud Mammeri de Tizi-Ouzou, LPCQ, BP 17 RP, 15000 Tizi-Ouzou, Algeria.
Université de Paris, Laboratoire ITODYS, CNRS, F-75006 Paris, France.
Nanoscale. 2025 Jan 16;17(3):1536-1543. doi: 10.1039/d4nr02364a.
Metallic nanoparticles exhibit remarkable optical properties through localized surface plasmon (LSP) resonances. When arranged in arrays, nanoparticles form surface lattice resonances (SLRs) affected by inter-particle distance. SLRs can offer narrower bandwidths and stronger electric field enhancements than LSP modes, crucial for efficient optical device development. Among important aspects, grazing diffracted orders crucially impact SLR properties, facilitating long-range nanoparticle interactions. This study explores how these photonic modes propagating at the substrate surface influence SLRs, by using experimental and theoretical approaches, including Finite Difference Time Domain simulations on gold disk arrays. Results show SLR properties strongly rely on diffracted mode efficiency controlled by the grating constant along the incident polarization. Notably, large inter-particle spacing along the incident polarization can strongly reduce the SLR red-shift. Understanding and managing long-range interactions in engineered plasmonic structures are highlighted, providing insights for enhanced performance in advanced photonic and optoelectronic devices.
金属纳米粒子通过局域表面等离子体（LSP）共振展现出卓越的光学特性。当排列成阵列时，纳米粒子会形成受粒子间距离影响的表面晶格共振（SLR）。与LSP模式相比，SLR能提供更窄的带宽和更强的电场增强，这对高效光学器件的开发至关重要。在重要方面中，掠射衍射级次对SLR特性有着关键影响，促进了纳米粒子的长程相互作用。本研究通过实验和理论方法，包括对金盘阵列进行时域有限差分模拟，探索这些在基底表面传播的光子模式如何影响SLR。结果表明，SLR特性强烈依赖于由沿入射偏振方向的光栅常数控制的衍射模式效率。值得注意的是，沿入射偏振方向的大粒子间距可显著减小SLR的红移。强调了理解和管理工程化等离子体结构中的长程相互作用，为提高先进光子和光电器件的性能提供了见解。
