A Tunable Metamaterial Absorber Based on VO 2 /W Multilayer Structure

A tunable planarized metamaterial absorber with VO 2 /W multilayer structure is designed to realize the biggest tuning absorption range of 77.10% at the central wavelength λ = 3.00 μm by the reversible phase transition of VO 2 between metallic and dielectric state. The finite difference time domain method is used to simulate the effects of main parameters, different polarization angles, and incident angles on the absorption properties. The results show that the absorber is polarization independent and insensitive to the incident angles. The experimental results show that the absorber has the tunable absorption range of 76.36% between low and high temperature, which matches well with the simulation outcome. It will have a wide use in the development of future metamaterial absorbers and other relevant applications.