Neighboring Interactions in a Periodic Plasmonic Material for Solar-Thermal Energy Conversion
Abstract
A periodic plasmonic meta-material was studied using finite-difference time domain (FDTD) method to investigate the influence of neighboring particles on the near unity optical absorptivity. The meta-material was constructed as a silver nanoparticle (20-90nm) situated above an alumina (AlO) dielectric environment. A full parametric sweep of the particle width and the dielectric thickness was conducted. Computational results identified several resonances between the metal-dielectric and metal-air that have potential to broadening the response through stacked geometry. A significant coupled resonance between the metal-dielectric resonance and a cavity resonance between particles was capture as a function of dielectric thickness. This coupled resonance was not evident below dielectric thicknesses of 40nm and above cavity widths of 20nm. Additionally, a noticeable propagating surface plasmon polariton resonance was predicted when the particle width was half the unit cell length.
Keywords
Cite
@article{arxiv.1505.03886,
title = {Neighboring Interactions in a Periodic Plasmonic Material for Solar-Thermal Energy Conversion},
author = {Terence D. Musho and Anitesh A. Lal and Zackary J. Coppens},
journal= {arXiv preprint arXiv:1505.03886},
year = {2015}
}