High-index Resonator Supercavity with Different Background Contrast

Our detailed study aims to analyze the effect of background contrast on the excitation of supercavity modes in high index resonators (HIR) for microstrip-HIR systems. This goal is achieved by designing a model in the microwave range; a high contrast background permittivity is defined depending on the system geometry and resonant frequency. We show that the Q-factor increases up to 80% of the material quality factor for optimized contrast and background.