Performance evaluation and analysis for carbon nanotube (CNT) based IR detectors

Jiangbo Zhang; Ning Xi; King W. C. Lai

doi:10.1117/12.720265

14 May 2007 Performance evaluation and analysis for carbon nanotube (CNT) based IR detectors

Jiangbo Zhang, Ning Xi, King W. C. Lai

Proceedings Volume 6542, Infrared Technology and Applications XXXIII; 65421N (2007) https://doi.org/10.1117/12.720265
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

Carbon nanotubes (CNTs) have a potential to be efficient infrared (IR) detection materials due to their unique electronic properties. The ballistic electronic transport property makes the noise equivalent temperature difference smaller compared to other semiconducting materials. In order to explore this potential application, CNT based IR detectors are fabricated by depositing the CNTs on the substrate surface and then aligning them using the Atomic Force Microscopy (AFM) based nanomanipulation system. Normally semicnoductive CNT forms a Schottky barrier with the contact metal. The photogenerated electron-hole pairs within the Schottky barrier are seperated by an external electric field or the built-in field, producing a photocurrent. This paper will focus on the performance evaluation and analysis for the CNT based IR detectors. Experiments were carried out to investigate the photoresponse of single carbon nanotube based IR detectors. Based on the experimental results, the detectivity D* and the quantum efficiency are calculated and analyzed. The MWNT IR detector has a quantum efficiency of 0.313, which is much larger than the reported values of SWNTs. And the SWNT IR detector has a quantum efficiency of 0.01, which is consistent with the reported values. Both MWNT and SWNT show a low detectivity. The analysis shows that the performance of CNT based IR detectors can be further improved by using asymmetric contacts instead of symmetric contacts.

Citation Download Citation

Jiangbo Zhang, Ning Xi, and King W. C. Lai "Performance evaluation and analysis for carbon nanotube (CNT) based IR detectors", Proc. SPIE 6542, Infrared Technology and Applications XXXIII, 65421N (14 May 2007); https://doi.org/10.1117/12.720265

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available