Modeling of Plasmonic Phenomena in Nanostructured Surfaces

Abstract

Plasmonic phenomena in nanostructured surfaces are modeled by considering isotropic pointlike nanoparticles whose responses to an incident surface plasmon polariton (SPP) field are phenomenologically related to their effective polarizabilities. Numerical simulations of different SPP elastic (in-plane) scattering orders and the operation of simple plasmonic devices are presented. Futhermore, nonlinear microscopy with a tightly focused laser beam scanning over a sample surface was modeled by using of analytic representations of the Green dyadic in the near-and far-field regions, with the latter being approximated by the part describing the scattering via excitation of SPPs. In general, the stability with respect to geometrical parameters and dispersion were the main features investigated in the presented plasmonic phenomena.

Classical Plasmonics: Wave Propagation Control at Subwavelength Scale

“…20 Numerical simulations performed with a relative simple vectorial dipolar model for multiple SPP scattering were used as a complementary research in order to realize a 2D counterpart of conventional optics. 21 For example, from the calculations of a plasmonic interferometer element, it was understood that the splitting e±ciency is very sensitive to the incidence angle, 22 which is in good agreement with experimental data available in literature. 23 Another interesting alternative for investigation of plasmonic elements is the usage of microwave radiation.…”

“…The idea has been modeled using total Green's tensor formalism and the dipole approximation for multiple SPP scattering by nanoparticles. 56,57 The bumps forming the arrays were approximated by spherical particles, considered as point-dipole scatterers suspended 40 nm above the surface, and characterized with isotropic free-space polarizability obtained in the long-wavelength approximation. Here, we chose an inter-particle distance of 200 nm and an inter-line separation of 350 nm with an incident beam angle of 60 .…”

Optical and antibacterial properties of synthesised silver nanoparticles

“…1. Introduction: Among the noble metals, silver nanoparticles (AgNPs) have become very popular among the researchers due to their analytical, electrical, magnetic and catalytic properties [1][2][3][4]. These properties depend on their size, shape and surroundings [5,6].…”

Nanofotónica. Los grandes avances y retos de un mundo pequeño

“…Así, la LRM ha estimulado la investigación de nanofotónica en varias direcciones siendo una de estas la interacción y manipulación con nanoestructuras de los modos plasmónicos. En este contexto, se propusieron, con éxito, nanoestructuras plasmónicas más complejas y funcionales (ver figura 4) tales como interferómetros (Ditlbacher et al, 2002;Coello et al, 2004;Cortes y Coello, 2009), prismas (Radko et al, 2008a), lentes (Radko et al, 2008b), espejos parabólicos (Smolyanivov et al, 2005) y (sobre todo) guías de onda (Fang et al, 2015).…”