Title :
Room-temperature terahertz detection by carbon nanotube/metal heterostructures
Author :
Yingxin Wang ; Guowei Zhang ; Lingbo Qiao ; Jinquan Wei ; Jia-Lin Zhu ; Zhiqiang Chen ; Ziran Zhao ; Jia-Lin Sun
Author_Institution :
Dept. of Eng. Phys., Tsinghua Univ., Beijing, China
Abstract :
We report on the observation of the significant photocurrent response of a carbon nanotube (CNT) heterostructure device illuminated by continuous-wave terahertz (THz) radiation. The device consists of a double-walled CNT macrobundle contacted with two metallic nickel electrodes. A room-temperature current responsivity up to ~0.3 mA/W was obtained when THz radiation was incident on the position of the CNT/nickel contact. Compared to the results we previously reported for a CNT film/metal heterojunction sample, the device presented here shows improved response performance and a greater potential for THz detection.
Keywords :
carbon nanotubes; electrodes; photoconductivity; terahertz wave detectors; terahertz waves; CNT heterostructure device; THz detection; carbon nanotube heterostructure device; continuous-wave THz radiation; continuous-wave terahertz radiation; double-walled CNT macrobundle; metallic nickel electrodes; photocurrent response; room-temperature current responsivity; Carbon nanotubes; Electrodes; Films; Heterojunctions; Nickel; Photoconductivity;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956010
