Open AccessNear-field interaction of two-dimensional high-permittivity spherical particle arrays on substrate in the Mie resonance scattering domain
Author(s) -
Yuto Tanaka,
Go Obara,
Akira Zenidaka,
N.N. Nedyalkov,
Mitsuhiro Terakawa,
Minoru Obara
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.027226
Subject(s) - mie scattering , particle (ecology) , optics , resonance (particle physics) , permittivity , materials science , scattering , refractive index , light scattering , substrate (aquarium) , physics , atomic physics , dielectric , optoelectronics , oceanography , geology
We describe theoretical and experimental results on near-field interaction of two-dimensionally (2D) arrayed, high-permittivity spherical particles on a substrate in the Mie resonance scattering domain for surface nano-patterning processing. When a touching particle pair of Mie resonance particles on the substrate is considered, an electromagnetic mode different from the single particle mode is excited inside the particles, resulting in an intensity enhancement in a gap between two hotspots at particle-substrate contact points. As for 2D hexagonal close-packed particle arrays on the substrate, the refractive index of particle exhibiting a maximal enhancement factor for the 2D particle arrays is found to be shifted from the Mie resonance conditions for the single particle system.