The invention discloses an electrically controlled terahertz wave switch with multilayer
metal layer structures. The electrically controlled terahertz wave switch includes a substrate layer, a silicondioxide layer and a multilayer
metal structure array layer. The multilayer
metal structure array layer is composed of 6*6 arranged multilayer metal unit structures, and each multilayer metal
unit structure is composed of an upper rectangular metal layer, a middle bridge-shaped metal layer and a lower stair-shaped metal layer. When terahertz signals vertically irradiate a terahertz wave switch andno
voltage exists between the upper rectangular metal
layers and the substrate layer, due to the discontinuity among the metal
layers, the intensities of induced electric fields and magnetic fields at the upper and lower sides of the switch are lowest, terahertz
waves can pass, and the switch is in a switch-on state; when
voltage is applied between the upper rectangular metal
layers and the substrate layer, the middle bridge-shaped metal layers deflect and are connected with the lower trapezoidal metal layers, at this time, the discontinuity among the metal layers is eliminated, surface currents are formed on metal electrons, therefore, extremely large electric fields and magnetic fields are generated at the top of the switch, the terahertz
waves are reflected, and the switch is in a switch-off state; the electrically controlled terahertz wave switch with the multilayer metal layer structures has the advantages of being simple and compact in structure, small in size, novel in controlprinciple, easy to process and the like.