Title

Optimization Of Surface Plasmon Excitation Using Resonant Nanoparticle Arrays Above A Silver Film

Keywords

Anti-crossing; Nanoparticle array; Resonance; Surface plasmon

Abstract

A plasmonic coupling device consisting of an array of ellipsoidal silver nanoparticles embedded in silica in close proximity to a silver surface is studied. By tuning the inter-particle spacing, the shape of the particles in the array, and the height of the array above the silver film, the array-mediated surface plasmon excitation is studied. Finite Integration Technique simulations of such a plasmon coupler optimized for operation at a free space wavelength of 676 nm are presented. Plane wave normal incidence excitation of the system results is seen to result in resonantly enhanced fields near the nanoparticles, which in turn excite surface plasmons on the metal film. The existence of an optimum particle-surface separation for maximum surface plasmon excitation efficiency is demonstrated. Analysis of the frequency dependent electric field in the simulation volume as a function of particle aspect ratio reveals the influence of the particle resonance and the surface plasmon resonance on the excitation efficiency.

Publication Date

12-1-2007

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

6641

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.735340

Socpus ID

42149169620 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/42149169620

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