title: Wide-band frequency-tunable terahertz and infrared detection with graphene.
abstract: We report a graphene-based frequency-selective terahertz (THz) and infrared (IR) detector. The experimental results have demonstrated that the graphene transistor under a magnetic field is capable of detecting THz and IR waves in a very wide band of frequencies (0.76-33 THz) and that the detection frequency is tuned by changing the magnetic field. We have further imaged electric potential distribution in the graphene detector and have observed local step structure associated with impurities. The THz and IR photoconductivity properties of graphene are likely to be sensitive to such potential steps.
authors.affiliation: Quantum Nano-electronics Research Center, Department of Physical Electronics, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan. kawano@pe.titech.ac.jp
authors.forename: Yukio
authors.initials: Y
authors.lastname: Kawano
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry* / Q000528:radiation effects; D008422:Materials Testing; D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects; D036103:Nanotechnology / Q000295:instrumentation*; D010316:Particle Size; D011874:Radiometry / Q000295:instrumentation*; D055053:Terahertz Radiation; D014173:Transistors, Electronic
chemical_list: D006108:Graphite