Wednesday, November 11, 2015
Abstract-Response of asymmetric carbon nanotube network devices to sub-terahertz and terahertz radiation
Demand for efficient detectors resulted in intensive study of the asymmetric carbon nanostructures as a possible solution for that problem. It was maintained that photothermoelectric under certain conditions results in strong response of such to even at room temperature. In this work, we investigate different mechanisms underlying the response of asymmetric based to sub-terahertz and Our structures are formed with networks instead of individual so that probed are more generic and not caused by peculiarities of an individual nanoscale object. We conclude that the DC voltage response observed in our structures is not only thermal in origin. So called diode-type response caused by asymmetry of the IV characteristic turns out to be dominant at room temperature. Quantitative analysis provides further routes for the optimization of the configuration, which may result in appearance of novel detectors.