Design and investigation of a polarization-insensitive nine-band tunable metamaterial absorber at THz frequencies with equal to or more than 90% absorption ratio in all the bands are reported. The consists four isosceles triangle patches U-shaped cut paths on top an indium antimonide substrate, which has fully metallic ground plane backside. Numerical analyses show that wide-angle characteristi...

Today, the cost of treating cancer is very high at medical center. So, early detection essential, and one possible ways to diagnose in stages use sensors that are made terahertz area. The proposed absorber a multilayer structure which graphene used upper middle layer has ribbon form. A disk form element for layer. Finally, ring added structure. In final absorber, actually encompasses field, thi...