▎ 摘　　要

NOVELTY - The photodetector (10) has a micro-ribbon array (14) formed on a substrate and including a set of graphene micro-ribbons (16) of predetermined width extending in a spaced apart relationship with the micro-ribbon with respect to another. An array of electrode lines (22) is formed in electrical contact with the micro-ribbon array and extended in spaced apart relationship with the line with respect to another. The micro-ribbons are sandwiched between the array of electrode lines and the substrate, and extend in an angled relationship different than 90 degrees to the electrode lines. USE - Plasmon-enhanced terahertz graphene-based photodetector for use in potential photonic applications e.g. optical modulator applications, plasmonic device applications and terahertz emitter applications. ADVANTAGE - The photodetector is increased external efficiency attained by enhancing a resonant plasmon absorption tunable through geometric parameters of a structure and controlling carrier density to enhance the absorption of radiation by graphene. The photodetector increases mobility of the graphene, thus increasing scattering time and achieving a high quality factor, and hence providing higher efficiency and better spectral sensitivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for fabricating a plasmon-enhanced terahertz graphene-based photodetector. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a graphene-based photodetector. Plasmon-enhanced terahertz graphene-based photodetector (10) Micro-ribbon array (14) Graphene micro-ribbons (16) Electrode lines (22) Drain terminal (34)