Carbon Nanotube Film Terahertz Detectors with Multiple PN Junctions

Carbon nanotube (CNT) films are highly promising as flexible absorbers for terahertz (THz) imaging devices to realize THz applications regardless of the shape/size of inspection objects. Despite the strong interest, the thermal device structure of the CNT film-based THz imagers has not been fully optimized. Here we developed CNT film THz detectors by integrating multiple PN junctions and successfully enhanced THz response by a factor of 10 compared to earlier single PN junction THz devices.