Open AccessInterferometric scattering of a single plasmonic nanoparticle cluster assembled in a nanostructured template
Author(s) -
Ya Xu,
Yan Meng,
Shuang Zhou,
Weihua Zhang
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.420801
Subject(s) - materials science , plasmon , scattering , substrate (aquarium) , optics , light scattering , interferometry , nanostructure , raman scattering , nanoparticle , cluster (spacecraft) , plasmonic nanoparticles , nanotechnology , optoelectronics , physics , raman spectroscopy , computer science , oceanography , programming language , geology
In this work, we investigate the light scattering of a single Au nanoparticle cluster assembled in a nanostructured substrate and study how the substrate geometry influences the scattering spectrum. An explicit model was built with the help of the Green's tensor theory, showing that there are two distinct types of substrate effects, namely, the interferometric scattering caused by the local corrugation and the spectral modulation caused by the global features (i.e., the layered substrate in this work). The result predicted by the model agrees with the experimental results well, providing a simple yet quantitative tool for the spectral interpretation of plasmonic nanostructures with complex substrates.