INFIQC   05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
artículos
Título:
Enhancement and Confinement of The Electromagnetic Fileds Inside Hot Spots
Autor/es:
EDUARDO PERASSI; LUIS CANALI; EDUARDO A. CORONADO
Revista:
JOURNAL OF PHYSICAL CHEMISTRY C
Editorial:
AMER CHEMICAL SOC
Referencias:
Año: 2009 vol. 113 p. 6315 - 6319
ISSN:
1932-7447
Resumen:
A novel and easy approach to implement is developed to analyze the degree of convergence,confinement and enhancement  of calculated electromagnetic fileds generated in plasmonic nanoparticles (NPs) of arbitraryshape. The approach is based on computing the variation of the volume trapped (VT) between a constant enhancement surface around a metal NP and the nanoparticle surface boundary as a function of the enhancement itself.This method is a new and a more practically relevant approach to test the convergence than measurestraditionally employed. For the test cases outlined here, the converged VT vs enhancement  curve could be fitted very accurately to a triple exponential expression which makes it convenient to determine the mean field enhancement within a trapped volume outside the NP, as well as the degreeof localization and spreading of the hot spots(HSs) in 3D space. The technique introduced here should aid the understanding and a rational design ofplasmonic devices based on metal NPs, where the near filed plays a major role, such as in plasmon enhancedspectroscopies and plasmon imaging.