Title :
Optical response time for carbon nanotube based infrared detectors
Author :
Lai, King Wai Chiu ; Xi, Ning ; Fung, Carmen Kar Man ; Chen, Hongzhi
Author_Institution :
Dept. of Electr. & Comput. Eng., Michigan State Univ., East Lansing, MI, USA
Abstract :
We present the development of a single carbon nanotube (CNT) based optical detector in the infrared (IR) region. CNTs have been found to be sensitive under IR radiation and they could be used as IR sensing elements. When a CNT is manipulated between two metal electrodes, two contacts are formed at the CNT-metal interfaces. The contact conditions play an important role in IR detection. Current results indicated that asymmetric electrode is capable to maximize photocurrent. The optical response time of the devices was also measured and considered. Beside, a reliable and efficient nano-manufacturing process has been introduced to build CNT-based IR detector. As a result, high efficiency, high sensitivity, stable and reliable performance CNT-based IR detectors can be fabricated.
Keywords :
carbon nanotubes; electrodes; elemental semiconductors; infrared detectors; nanoelectronics; nanotube devices; photoconductivity; photodetectors; semiconductor nanotubes; semiconductor-metal boundaries; C; CNT-metal interfaces; IR detector; asymmetric electrode; infrared detectors; metal electrodes; optical response time; photocurrent; single carbon nanotube; Carbon nanotubes; Chemical elements; Delay; Electrodes; Infrared detectors; Optical detectors; Optical devices; Optical sensors; Photoconductivity; Time measurement; Carbon nanotube; Infrared detectors; Schottky photodiode;
Conference_Titel :
Nanotechnology, 2009. IEEE-NANO 2009. 9th IEEE Conference on
Conference_Location :
Genoa
Print_ISBN :
978-1-4244-4832-6
Electronic_ISBN :
1944-9399
