Abstract
A low terahertz broadband tunable absorber was proposed, which composed of vanadium oxide (VO2) film and nematic liquid crystal layer. The simulation results show that the absorption is great than 90% in the frequency range of 0.458–1.1492 THz. The tuning absorber was realized by increasing the temperature to modulate the VO2 transited into metal state. Since the dielectric constant of the nematic liquid crystal can be adjusted by bias voltage, without changing the intensity of absorption, however, a shift in the bandwidth was observed. In addition, the designed structure is insensitive to incident light polarization and still remained high absorption at 60°. The tunable broadband metamaterial absorber can be used for attenuator and energy harvesting.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
