Lattice Resonances Induced by Periodic Vacancies in Arrays of Nanoparticles

Abstract

Periodic arrays of nanoparticles are capable of supporting lattice resonances, collective modes arising from the coherent interaction of the particles in the array. These resonances, whose spectral position is determined by the array periodicity, are spectrally narrow and lead to strong optical responses, making them useful for a wide range of applications, from nanoscale light sources to ultrasensitive biosensors. Here, we report that, by removing particles from an array in a periodic fashion, it is possible to induce lattice resonances at wavelengths commensurate with the periodicity of these vacancies, which would otherwise not be present in the system. Using a coupled dipole approach, we perform a comprehensive analysis of how the properties of these vacancy-induced lattice resonances depend on the array periodicity, the particle size, and the number of vacancies per unit of area. Furthermore, we find that these lattice resonances have a subradiant character and originate from the symmetry breaking introduced in the unit cell by the presence of the vacancies. Finally, we investigate a potential implementation of an array with vacancies made of nanocylinders embedded in a homogeneous dielectric environment. The results of this work serve to advance our understanding of lattice resonances and provide an alternative method for controlling the optical response of periodic arrays of nanostructures.

Collective Resonances of a Twisted Plasmonic Array Pair

“…In DDA, each element (particle) of the array is modeled as a polarizable dot; polarization happens and forms a point dipole under an external electric field. Designing a plasmonic lattice with novel properties using DDA has made great progress. − We will show that the plasmonic structure introduced in this work may find applications in rotation sensors, etc.…”

Low‐Threshold Bound State in the Continuum Lasers in Hybrid Lattice Resonance Metasurfaces

“…Two antiphase SLRs can be generated by the hybrid lattice system, which has been demonstrated theoretically in the literature. [ 58,59 ] In this study, hybrid SLRs were generated using Si 3 N 4 nanobrick arrays because a high refractive index contrast and low material loss are essential for creating BICs.…”

Diffraction-induced quadrupolar lattice plasmon modes of high-quality factors for silver nanoparticle arrays

“…近场特性，被广泛应用于增强光与物质相互作用，在纳米激光 [1] 、生物化学传感 [2] 、表面增强拉曼散射 [3] 、荧光增强 [4] 等领域展现出极大的应用价值。然而金属本 身存在较高的吸收损耗，导致光谱共振线宽较宽，因此，这也成为阻碍表面等离 子体共振进一步发展的障碍之一。 近年来，研究人员发现在阵列结构中金属纳米粒子的 LSPRs 与瑞利异常 (rayleigh anomalies，RAs)衍射之间的耦合能产生表面晶格共振 [5][6][7][8][9][10][11] (surface lattice resonances，SLRs) ，这种共振由于能有效抑制辐射损耗、进一步增强光与 物质相互作用而被广泛应用于光子-激子耦合 [12] 、非线性增强 [13,14] 、LED [15] 等诸…”