Ferrimagnetic-like surface resonance from hybrid metamaterial slab

TL;DR

This paper demonstrates that a hybrid metamaterial slab with two cavity types exhibits ferrimagnetic-like surface resonances, enabling phenomena like directive emission, negative reflection, and retro-directive backtracking, verified experimentally in microwaves.

Contribution

It introduces a novel hybrid metamaterial design that produces ferrimagnetic-like surface resonances with unique electromagnetic phenomena.

Findings

Observation of ferrimagnetic-like surface resonances.

Realization of directive emission and negative reflection.

Experimental verification in microwave frequencies.

Abstract

We show that a hybrid metamaterial slab comprising of an one-dimensional array of two different types of cavities exhibits ferrimagnetic-like surface resonances which can be used to realize interesting phenomena such as directive emission as a consequence of strong angle-dependent reflection phase and the selective coupling of a Gaussian incident beam into a higher order diffractive channel, giving rise to the phenomenon of negative reflection and retro-directive backtracking. The findings are verified by experiments in the microwave regime.