Plasmonic surface lattice resonances in arrays of metallic nanoparticle dimers
Plasmonic surface lattice resonances in arrays of metallic nanoparticle dimers
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DOI：
10.1088/2040-8978/18/3/035005
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发表时间：
2016-03-01
影响因子：
2.1
通讯作者：
Barnes, W. L.
中科院分区：
文献类型：
--
作者：
Humphrey, A. D.;Barnes, W. L.
我们研究了金属纳米颗粒的正方形阵列的光学响应，其中每个晶格位置被两个粒子，一个二聚体占据。特别是，我们研究在这些结构中产生的表面晶格共振时，与纳米粒子的等离子体激元模式耦合在一起的面内偶极矩。向基底添加第二颗粒导致更复杂的光学响应，其在阵列的平面中是各向异性的。消光光谱记录在垂直入射的入射电场的不同取向。我们比较我们的实验得出的数据与那些从耦合偶极子模型。我们展示了如何组成二聚体的颗粒之间的分离有助于确定系统的整体响应。
We investigate the optical response of square arrays of metallic nanoparticles where each lattice site is occupied by two particles, a dimer. In particular we examine the surface lattice resonances arising in these structures when the in-plane dipole moments associated with the plasmon modes of the nanoparticles couple together. The addition of a second particle to the basis leads to a more complex optical response, one that is anisotropic in the plane of the array. Extinction spectra are recorded at normal incidence for different orientations of the incident electric field. We compare our experimentally derived data with those from a coupled-dipole model. We show how the separation between the particles that comprise the dimer helps determine the overall response of the system.