CORONADO EDUARDO ANDRES
Congresos y reuniones científicas
Título:
Analyzing The Confinement and Enhancement of Hot Spots in Plasmonic Nanoparticle Pairs
Autor/es:
EDUARDO M. PERASSI; LUIS R. CANALI; EDIARDO A. CORONADO
Lugar:
Valparaíso, Chile
Reunión:
Congreso; Sólidos 2009; 2009
Institución organizadora:
Universidad Técnica Federico Santa Marí,
Resumen:
In previous work In a previous work we have developed a quantitative approach to account for the degree of convergence, confinement and enhancement of electromagnetic fields generated
in single plasmonic NPs. The approach is based on computing the variation of the volume
trapped (VT ) between a surface with constant field enhancement around a metal NP and the nanoparticle surface boundary as a function of the enhancement itself. This variation of the trapped volume (VTV) allow us to test the convergence of the electrodynamic calculation and could be fitted very accurately to an analytical expression of VT vs the enhancement factor . Using this expression, the mean field enhancement within a trapped volume outside the NP as well as the degree of localization and spreading of the HS on 3D space could be determined.
In the present work we have extended the VTV approach to more complex nanostructures in particular for ?a pair of two plasmonic Nps?, a system of great interest because of its potential to produce enormous field enhancement factors . The calculations were performed using the DDA method for two representative nanoparticle pairs: a system of two spheres and bow ttie nano-antennas separated a few nanometers from each other.
in single plasmonic NPs. The approach is based on computing the variation of the volume
trapped (VT ) between a surface with constant field enhancement around a metal NP and the nanoparticle surface boundary as a function of the enhancement itself. This variation of the trapped volume (VTV) allow us to test the convergence of the electrodynamic calculation and could be fitted very accurately to an analytical expression of VT vs the enhancement factor . Using this expression, the mean field enhancement within a trapped volume outside the NP as well as the degree of localization and spreading of the HS on 3D space could be determined.
In the present work we have extended the VTV approach to more complex nanostructures in particular for ?a pair of two plasmonic Nps?, a system of great interest because of its potential to produce enormous field enhancement factors . The calculations were performed using the DDA method for two representative nanoparticle pairs: a system of two spheres and bow ttie nano-antennas separated a few nanometers from each other.
