Adjustment of electric field intensity by dielectric metamolecule hybridization model

TL;DR

This paper demonstrates how hybridization in dielectric metamolecules can control electric field intensity, enabling applications like microwave heating, signal amplification, and shielding by tuning resonance modes through structural parameters.

Contribution

It introduces a Mie-based dielectric metamolecule hybridization model that explains resonance splitting and field enhancement control via interaction effects.

Findings

Hybridization causes splitting of resonance dips into two modes.

Electric field at the gap can be enhanced or diminished.

Tuning coupling factors adjusts the enhancement amplitude.

Abstract

In this paper, we report on achieving hybridization effect in a Mie-based dielectric metamolecule and provide their physically intuitive picture. The hybridization results in the splitting of the initial overlapping resonance dips, thus leading to two new collective resonance modes. It can be observed via the displacement electric field distribution that the two modes behave as the in-phase and out-of-phase oscillation of two meta-atoms, thus enhancing and diminishing the intensity of electric field at the gap between two meta-atoms. Moreover, since the two hybridized modes are caused by the interaction effect, the enhancement amplitude can be adjusted by several coupling factors, like gap distances and spot positions. Taking advantage of the two collective modes of the dielectric metamolecule, certain locations in the metamolecule can be applied as heating zones in microwave band and signal amplifier or shielding zones in communication fields.