Resonant transmission of light in arrays of high-index dielectric nanoparticles

TL;DR

This paper investigates how high-Q resonators in arrays of dielectric nanoparticles can control light transmission through Fano interference, supported by numerical, analytical, and experimental results at microwave frequencies.

Contribution

It introduces a practical method to achieve resonant light control using dielectric particles' quadrupole resonances, combining theory and microwave experiments.

Findings

Resonant transmission is achieved via Fano interference.

High-Q dielectric resonators enable precise light control.

Experimental validation with ceramic spheres at microwaves.

Abstract

We study numerically, analytically and experimentally the resonant transmission of light in a waveguide formed by a periodic array of high-index dielectric nanoparticles with a side-coupled resonator. We demonstrate that a resonator with high enough Q-factor provides the conditions for the Fano-type interference allowing to control the resonant transmission of light. We suggest a practical realization of this resonant effect based on the quadrupole resonance of a dielectric particle and demonstrate it experimentally for ceramic spheres at microwaves.