▎ 摘　　要

NOVELTY - The detector has an insulating layer formed on a conductive substrate. A single-layer graphene is formed at a part of an upper end of the insulating layer, and in a single layer. A multi-layer graphene is formed at another part of the upper end of the insulating layer, and in multiple layers. A first electrode (151) is formed at an end of the single-layer grapheme. A second electrode (152) is formed at an end of the multi-layer graphene. The single-layer graphene and the multi-layer graphene are implemented in a form of quadrangular saw teeth. USE - Photo detector for detecting incident light by using a periodic arrangement of a single-layer graphene and a multi-layer graphene. ADVANTAGE - The single-layer graphene and the multi-layer graphene are formed at the upper end of the insulating layer, so that need of forming heterogeneous metal electrodes can be avoided, thus minimizing damage to the graphene during manufacturing process of the detector. The detector uses electrodes formed of a single metal by using photo-thermoelectric effect generated on the boundary surface of the single-layer graphene and the multi-layer graphene, thus simplifying element structure from not being dependent on a wavelength of incident light. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a photo detector. Electrodes (151, 152)