Thermal tuning of terahertz metamaterial absorber properties based on VO 2

We present a novel, structurally simple, multifunctional broadband absorber. It consists of a patterned vanadium dioxide film and a metal plate spaced by a dielectric layer. Temperature control allows flexible adjustment of the absorption intensity from 0 to 0.999. The modulation mechanism of the absorber stems from the thermogenic phase change properties of the vanadium dioxide material. The absorber achieves total reflection properties in the terahertz band when the vanadium dioxide is in the insulated state. When the vanadium dioxide is in its metallic state, the absorber achieves near-perfect absorption in the ultra-broadband range of 3.7 THz-9.7 THz. Impedance matching theory and the analysis of electric…

• NN
  National Natural Science Foundation of China

  Awards: 21506257, 11604311, 61705204, 51606158, 61805278
• SU
  Southwest University of Science and Technology

  Awards: JZ21-052, JZ21-057
• DO
  Department of Science and Technology of Sichuan Province

  Awards: 2020YFG0467, 2020YJ0137