The invention discloses a
broadband adjustable terahertz wave absorber based on
graphene. The
broadband adjustable terahertz wave absorber comprises a top layer, a first
dielectric layer, a middle layer, a second
dielectric layer and a bottom layer substrate which are sequentially arranged from top to bottom. The top layer and the middle layer are both
graphene layers, wherein the absorption peaks of incident
waves are crossed and overlapped when the top layer and the middle layer reach
resonance; the
chemical potential of the top layer is regulated and controlled through a bias
voltage Vg between the top layer and the bottom layer substrate, and the
chemical potential of the middle layer is regulated and controlled through a bias
voltage Vs between the middle layer and the bottom layer substrate. According to the invention, the top layer and the middle layer are arranged and are both
graphene layers, so that good
impedance matching is realized; absorption peaks of incident
waves are crossed and overlapped when the top layer and the middle layer achieve
resonance, so that the working bandwidth is effectively widened; the
chemical potential of the graphene layer is dynamically regulated and controlled through bias
voltage, and the dynamic regulation effect of the wave absorbing amplitude of the wave absorber is achieved; the
broadband adjustable terahertz wave absorber is simple in structure, small in size, perfect in
absorption effect and good in flexibility.