Direct measurements of the AC performance of carbon nanotube field effect transistors

Carbon nanotube field-effect transistors are expected to operate at very high frequencies, possibly in the THz regime, making them attractive for future nanoelectronics technologies. However, due to formidable measurement difficulties, this performance has not yet been demonstrated. This paper reports: 1) the first direct observation of CNFETs operating at several hundred MHz; and 2) illustrates how to extend direct frequency response measurements to the GHz regime.