多孔金膜的表面等离子体色散特性

Surface Plasmon's Dispersion Properties of Porous Gold Films.

作者信息

Stetsenko M O, Maksimenko L S, Rudenko S P, Krishchenko I M, Korchovyi A A, Kryvyi S B, Kaganovich E B, Serdega B K

机构信息

V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 45, Pr. Nauky, Kyiv, 03028, Ukraine.

出版信息

Nanoscale Res Lett. 2016 Dec;11(1):116. doi: 10.1186/s11671-016-1327-7. Epub 2016 Feb 29.

DOI:10.1186/s11671-016-1327-7

PMID:26925864

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4771662/

Abstract

Nanostructure porous films with arrays of gold nanoparticles (Au NPs) have been produced by pulsed laser deposition. Dispersion properties of surface plasmons have been studied by the modulation-polarization spectroscopy technique. The dispersion relations for radiative modes and two types of non-radiative modes of localized and propagating surface plasmons were obtained. The branches of propagating modes were characterized by negative group velocity caused by spatial dispersion of dielectric function. The propagating modes are caused by dipole-dipole interactions between adjacent Au NPs. The frequencies and relaxation parameters of surface plasmon resonances and the plasma frequencies for Αu NPs were obtained. The relation between the surface plasmon's properties and formation conditions of films with arrays of Αu NPs is discussed.

摘要

通过脉冲激光沉积制备了具有金纳米颗粒（Au NPs）阵列的纳米结构多孔薄膜。利用调制偏振光谱技术研究了表面等离子体激元的色散特性。获得了辐射模式以及局域表面等离子体激元和传播表面等离子体激元两种非辐射模式的色散关系。传播模式的分支特征是由介电函数的空间色散引起的负群速度。传播模式是由相邻Au NPs之间的偶极-偶极相互作用引起的。获得了表面等离子体激元共振的频率和弛豫参数以及Au NPs的等离子体频率。讨论了表面等离子体激元的性质与具有Au NPs阵列的薄膜形成条件之间的关系。