Broadband Absorption Antenna Based on High Refractive Index Tungsten Metal-Insulator-Meta Metamaterial Nano Ring Array

Abstract

Antennas for solar energy collection, for the problem of complex antenna structure and narrow absorption band, a metal-insulator-metal (MIM) nano ring array antenna based on metamaterial is proposed, which has high-efficiency light absorption characteristics in the broadband range of visible light and near-infrared light. Based on surface plasma theory, the proposed antenna is only composed of two W layers of metal and one Al2O3 layer of insulator medium, and has an a verage absorption rate of 96.93% in the range of 400–1600 nm. In addition, it is found that this kind of super light-absorbing capability is independent of the incoming light polarization state and can maintain an average of 91% for an incident angle as large as±60°. Furthermore, the perfect absorption performance of MIM nano ring array antenna based on metamaterial can be explained by the synergistic effect of localized surface plasmon resonance enhancement and Fabry-Perot resonance.