Millimeter wave simple-spectrum signal detector based on metamaterial and manufacturing method thereof

The invention discloses a millimeter wave simple-spectrum signal detector based on a metamaterial. The millimeter wave simple-spectrum signal detector comprises a substrate layer, an N-type gallium arsenide layer, a silicon dioxide layer, a metamaterial layer, an ohmic electrode and a Schottky electrode which are sequentially arranged from bottom to top, wherein the metamaterial layer is a metal open loop resonance unit array with a periodic micro-nano structure, the metal open loop resonance unit array comprises a graph and characteristic size parameters of the graph, the graph has a characteristic of complete absorption on specific electromagnetic waves, corresponding electromagnetic wave absorption frequency bands can be regulated and controlled by changing the structure and the size parameters of a metal open loop resonance unit, and the electromagnetic wave absorption strength of the metal open loop resonance unit array in the metamaterial layer can be regulated and controlled by changing the depletion l