Low-loss electric and magnetic field-enhanced spectroscopy with subwavelength silicon dimers

By P. Albella, M. A. Poyli, M. Schmidt, S. A. Maier, F. Moreno, J. J. Sáenz, Javier Aizpurua. 2013

364 citations recorded by the source corpus.

Dielectric nanoparticles with moderately high refractive index and very low absorption (like Si and Ge in the visible–near-infrared (VIS–NIR) range) show a magnetodielectric behavior that produces interesting far-field coherent effects, like directionality phenomena or field enhancement in the proximity of the particle surface. As in the case of metals, ensembles of two or more dielectric particles can constitute basic elements for developing new spectroscopic tools based on surface field enhancement effects. Here we explore the electromagnetic behavior of the basic unit constituted by a dimer of dielectric nanoparticles made of moderately low-loss high refractive index material. The interactions responsible for the spectral features of the scattered radiation and field enhancement of the dimer are identified and studied through an analytical dipole–dipole model. The fluorescence of a single emitter (either electric or magnetic dipole) located in the dimer gap is also explored by calculating the quantum e...

Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/3adebadc22eae6988381ed01f0b528a741fb5783

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Citations in the corpus

Optimum Forward Light Scattering by Spherical and Spheroidal Dielectric Nanoparticles with High Refractive Index (2014, neutral): “φ θ π φ θ im m l lm e P m l m l l Y ) (cos )! ( )! ( 4 1 2 ) , ( + − + = , (13)”
Optically resonant dielectric nanostructures (2016, background): “Magnetic hotspots, in addition to the electric hotspots, result in an increase of the local optical density of states, and thus can modify the magnetic transition rates of molecules or quantum emitters with an enhancement of the Purcell factor (39, 45, 48).”