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arXiv · 1505.03886

Neighboring Interactions in a Periodic Plasmonic Material for Solar-Thermal Energy Conversion

Terence D. Musho·Anitesh A. Lal·Zackary J. Coppens
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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 (Al$_2$O$_3$) 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.

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Terence D. Musho, Anitesh A. Lal, Zackary J. Coppens. 2015-05-14. Neighboring Interactions in a Periodic Plasmonic Material for Solar-Thermal Energy Conversion. https://arxiv.org/abs/1505.03886

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