Influence of surface roughness on the optical properties of plasmonic nanoparticles

Autor:	Truegler, Andreas, Tinguely, Jean-Claude, Krenn, Joachim R., Hohenau, Andreas, Hohenester, Ulrich
Rok vydání:	2012
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Physics - Optics
Zdroj:	Phys. Rev. B 83, 081412(R) (2011)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.83.081412
Popis:	For plasmonic nanoparticles, we investigate the influence of surface roughness inherent to top-down fabrication on the optical properties, and find that it has a surprisingly small influence on the position and width of the plasmon peaks. Our experimental observation is supported by simulations based on the boundary element method approach. Using a perturbation approach, suitable for metallic nanoparticles with a moderate degree of surface roughness, we demonstrate that the reason for this lies in motional narrowing where the plasmon averages over the random height fluctuations. Surface roughness in large arrays of identical nanoparticles, such as encountered in the context of metamaterials, is thus expected to not constitute a major roadblock. Comment: 5 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1209.5200 Zobrazit plný text záznamu View this record from Arxiv