Temperature-tunable THz metamaterial absorber based on vanadium dioxide
Chunbao Liu, Jing Yin, Sheng Zhang
Abstract
To solve the limitation that the absorber can not be adjusted actively according to the external environment, a terahertz wave modulator is proposed and designed based on the adjustable conductivity of temperature-controlled phase change material vanadium dioxide thin film, which can realize switching metamaterial absorber. The absorber is composed of a metal substrate, insulating substrate and metal resonant unit. The transmission characteristics of the absorber are simulated by CST 2016 simulation software. The results show that the transmission coefficient of the designed filter can reach −41.62 dB at the resonant frequency, showing good stopband characteristics.
Topics & Concepts
Materials scienceMetamaterialTerahertz radiationTransmission coefficientSubstrate (aquarium)OptoelectronicsMetamaterial absorberVanadium dioxidePhase (matter)StopbandTransmission (telecommunications)MetalVanadiumOpticsThin filmTunable metamaterialsResonatorComputer scienceNanotechnologyTelecommunicationsOceanographyPhysicsGeologyOrganic chemistryChemistryMetallurgyMetamaterials and Metasurfaces ApplicationsTerahertz technology and applicationsEnergy Harvesting in Wireless Networks