Extraordinary all-dielectric light enhancement over large volumes.
We present resonant dielectric structures exhibiting arbitrarily large optical field enhancement, only limited by fabrication imperfections. Three different arrangements are investigated, based upon dielectric waveguides, dielectric particle arrays, and a combination of these two structures. Experimental confirmation of enhancement in a waveguide resonator is achieved by measuring the luminescence of quantum dots dispersed in the hot optical region of the structure. The performance of these systems can be readily controlled by simply changing geometrical parameters, which allows obtaining remarkable values of the intensity enhancement approaching 105 relative to the incident intensity over large volumes under feasible experimental conditions. This opens new avenues for all-optical switching and biosensing.
Instituto de ÓpticasCSIC, Serrano 121, 28006 Madrid, Spain.
Rebecca
R
Sainidou
Jan
J
Renger
Tatiana V
TV
Teperik
María U
MU
González
Romain
R
Quidant
F Javier
FJ
García de Abajo
D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008163:Luminescent Measurements / Q000295:instrumentation*; D045663:Quantum Dots; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation