Translator Disclaimer
6 May 2009 C-QWIP focal plane array sensitivity
Author Affiliations +
We are developing corrugated quantum well infrared photodetector (C-QWIP) technology for long wavelength applications. A number of large format 1024 × 1024 C-QWIP focal plane arrays (FPAs) have been demonstrated. The measured quantum efficiency η is ranging from 15 - 37%, depending on the detector type, doping density and number of quantum wells in the detector material. The photoconductive gain is between 0.07 and 0.19, while the spectral width is between 1.5 and 3.5 microns. Despite the large integrated η of the C-QWIPs, the number of collected photoelectrons can be limited in shorter cutoff, small pixel FPAs under high speed operation. In this case, the read noise will have a large impact on the system sensitivity. In this paper, we will discuss the detector model, the measured pixel characteristics, and the effects of read noise on the FPA performance. Our analysis shows that the tolerable read noise improves with the cutoff wavelength. For example, to achieve a sensitivity of 20 mK at 2 msec integration time, the respective read noise will be 1000, 2000, 3000, and 4000 e¯ at λc = 8.8, 9.4, 10.7 and 11.7 μm. This analysis will help to determine the read noise requirement for the C-QWIP FPAs.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
K. K. Choi, D. P. Forrai, D. Endres, J. Sun, P. Pinsukanjana, and J. W. Devitt "C-QWIP focal plane array sensitivity", Proc. SPIE 7298, Infrared Technology and Applications XXXV, 729807 (6 May 2009);


Resonator-QWIP FPA development
Proceedings of SPIE (June 04 2015)
Enhanced broadband (11-15 µm) QWIP FPAs for space applications
Proceedings of SPIE (September 22 2009)
C-QWIPs for far infrared detection
Proceedings of SPIE (May 03 2010)
Advantages of quantum cascade detectors
Proceedings of SPIE (February 12 2008)
C-QWIP focal plane array development
Proceedings of SPIE (September 03 2008)

Back to Top