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.
Sainidou
Rebecca
R
Instituto de ÓpticasCSIC, Serrano 121, 28006 Madrid, Spain.
Renger
Jan
J
Teperik
Tatiana V
TV
González
María U
MU
Quidant
Romain
R
García de Abajo
F Javier
FJ
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