Can dielectric resonators be useful for microwave heating?

The microwave dielectric resonators that we consider are multilayered structures where two or more materials with appropriate refractive indices are arranged in a given sequence. Generally, the transmissivity spectrum of such a structure exhibits forbidden bands and narrow transmission peaks. At resonance frequencies corresponding to these peaks the field localization phenomenon occurs, causing in some regions of the multilayer the field intensity to reach values significantly greater than the incident field one.