Dual-band tunable infrared metamaterial absorber with VO2 conformal resonators

- A conformal H-shaped tunable infrared absorber metamaterial is proposed.
- The mechanism of frequency tunable is relied on phase transition material.
- The absorption holds good angle stability.

A dual-band tunable infrared metamaterial absorber with VO2 is proposed. This tunable metamaterial absorber is constructed of three individual layers of conformal resonating layer, dielectric layer, and metallic background. The resonator is composed of gold and VO2. The electromagnetic (EM) wave absorption is numerically calculated and the working mechanism is explained by the surface current and LC-circuit model. Due to the fact that the resonator frequency depends on the resonating gold structure, it is found that by partially replacing the gold structure with VO2, the absorption frequency and intensity can be tuned through changing the temperature of VO2 resonate structure. In addition, the proposed method can be applicable to other resonate shapes.