Large-format quantum-well infrared photodetector arrays for astronomical instrumentation

Details Large-format quantum-well infrared photodetector arrays for astronomical instrumentation Large-format quantum-well infrared photodetector arrays for astronomical instrumentation

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4008.1298b&link_type=abstract

Proc. SPIE Vol. 4008, p. 1298-1304, Optical and IR Telescope Instrumentation and Detectors, Masanori Iye; Alan F. Moorwood; Eds.

Physics

Instrumentation and Detectors

1

Scientific paper

Quantum Well IR Photodetectors (QWIPs) afford greater flexibility than the usual extrinsically doped semiconductor IR detectors. The wavelength of the peak response and cutoff can be continuously tailored over a range wide enough to enable light detection at any wavelength range between 6-20 micrometers . The spectral band width of these detectors can be tuned from narrow to wide allowing various applications. Also, QWIP device parameters can be optimized to achieve extremely high performance sat lower operating temperatures due to exponential suppression of dark current. Furthermore, QWIPs offer low cost per pixel and highly uniform large format focal plane arrays (FPAs) mainly due to mature GaAs/AlGaAs growth and processing technologies. The other advantages of GaAs/AlGaAs based QWIPs are higher yield, lower 1/f noise and radiation hardness. Recently, we operated an IR camera with a 256 by 256 QWIP array sensitive at 8.5 micrometers at the prime focus of the 5-m Hale telescope, obtaining the images. The remarkable noise stability - and low 1/f noise - of QWIP focal plane arrays enable camera to operate by modulating the optical signal with a nod period up to100 s. A 500 s observation on dark sky renders a flat image with little indication of the low spatial frequency structures associated with imperfect sky subtraction or detector drifts.

Affiliated with

Also associated with

No associations

Rating

Large-format quantum-well infrared photodetector arrays for astronomical instrumentation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Large-format quantum-well infrared photodetector arrays for astronomical instrumentation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large-format quantum-well infrared photodetector arrays for astronomical instrumentation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-894693