Semiconductor structure, semiconductor device, photodetector and spectrometer

A semiconductor device, comprising:

• a gate electrode with a layered structure;
• an insulating layer located on a surface of the gate electrode;
• at least one metallic carbon nanotube located on a surface of the insulating layer;
• a semiconductor layer located on the surface of the insulating layer and covering the at least one metallic carbon nanotube;
• at least one graphene layer located on a surface of the semiconductor layer, wherein the semiconductor layer is located between the at least one metallic carbon nanotube and the at least one graphene layer and the at least one metallic carbon nanotube, the semiconductor layer and the at least one graphene layer are stacked with each other to form at least one three-layered stereoscopic structure;
• at least one first electrode electrically connected to the at least one metallic carbon nanotube;
• and
• at least one second electrode electrically connected to the at least one graphene layer.

A photodetector, comprising:

• a gate electrode being a layered structure;
• an insulating layer located on a surface of the gate electrode;
• at least one metallic carbon nanotube located on a surface of the insulating layer;
• a semiconductor layer located on the surface of the insulating layer and covering the at least one metallic carbon nanotube;
• at least one graphene layer located on a surface of the semiconductor layer, wherein the semiconductor layer is located between the at least one metallic carbon nanotube and the at least one graphene layer and the at least one metallic carbon nanotube, the semiconductor layer and the at least one graphene layer are stacked with each other to form at least one three-layered stereoscopic structure;
• at least one first electrode electrically connected to the at least one metallic carbon nanotube;
• at least one second electrode electrically connected to the at least one graphene layer;
• at least one current detecting element electrically connected with the at least first electrode and the at least second electrode;
• and
• at least one power source electrically connected with the at least first electrode and the at least second electrode.