Long-Wavelength Optical Properties of a Plasmonic Crystal

TL;DR

This paper investigates the long-wavelength optical behavior of a gold nanorod plasmonic crystal, demonstrating polariton excitation and stop band formation through analytical and numerical methods, with implications for fundamental and practical applications.

Contribution

It introduces an analytical model for the optical properties of plasmonic crystals and confirms it with numerical simulations, highlighting similarities with ionic crystals.

Findings

Induction of bulk polariton excitation in gold nanorod crystals

Creation of a polaritonic stop band in the optical spectrum

Analytical model validated by numerical simulations

Abstract

The long-wavelength optical properties of a plasmonic crystal composed of gold nanorod particles have been studied. Because of the strong coupling between the incident light and vibrations of free electrons, bulk polariton excitation can be induced and a polaritonic stop band will be created. An analytical model has been established,which was confirmed by the numerical simulations. The similarity between the plasmonic and ionic crystals, as well as various optical properties, may be of both fundamental and practical interests.