Terahertz sensing and imaging based on nano-carbon devices

Summary form only given. We present novel THz detectors using carbon nanotube (CNT) and graphene devices. The use of the CNT devices has lead to highly sensitive and frequency-tunable detection of THz photons. It has been also demonstrated that the graphene device is capable of detecting the THz wave in a very wide frequency band, which originates from characteristic Landau-level formation of massless Dirac fermions.