Spectral and angular distribution of Rayleigh scattering from plasmon-coupled nanohole chains
Spectral and angular distribution of Rayleigh scattering from plasmon-coupled nanohole chains
复制标题
DOI：
10.1063/1.3070520
复制
发表时间：
2009-01-12
影响因子：
4
通讯作者：
Atature, Mete
中科院分区：
文献类型：
--
作者：
Alaverdyan, Yury;Hempe, Eva-Maria;Atature, Mete
我们通过测量白色光和单频激光激发下的远场辐射图案和散射光谱，实验研究了20 nm金膜中纳米孔链的光学性质。我们观察到的频谱中的强度增强源自共振耦合纳米孔激发通过薄膜表面等离子体激元。然而，远场图案的角分布与谐振频率上和谐振频率下的相干辐射点偶极子链的角分布相同。我们强调了潜在的k-空间成像技术研究有序纳米结构的远场特性。
We experimentally investigate the optical properties of nanohole chains in 20 nm gold films by measuring the far-field radiation patterns and scattering spectra using both white light and single-frequency laser excitations. We observe intensity enhancement in the frequency spectrum originating from resonantly coupled nanohole excitations via thin film surface plasmon polaritons. However, the angular distribution of the far-field pattern is identical to that of a chain of coherently radiating point dipoles both on and off the resonance frequency. We highlight a potential of the k-space imaging technique for studying far-field properties of ordered nanoscale structures.