GaAs homojunction far-infrared detectors for astronomy applications

Details GaAs homojunction far-infrared detectors for astronomy applications GaAs homojunction far-infrared detectors for astronomy applications

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3354...39p&link_type=abstract

Proc. SPIE Vol. 3354, p. 39-47, Infrared Astronomical Instrumentation, Albert M. Fowler; Ed.

Computer Science

Performance

Scientific paper

A high performance, bias tunable, p-GaAs homojunction interfacial work function internal photoemission far-IR (FIR) detector has been demonstrated. A responsivity of 3.10 +/- 0.05 A/W, a quantum efficiency of 12.5 percent, and a detectivity D* of 5.9 X 10(superscript 10) cm (root) Hz/W, were obtained at 4.2K, for cutoff wavelengths form 80 to 100 micrometers . The bias dependences of quantum efficiency, detectivity, and cutoff wavelength have been measured and are well explained by the theoretical models. The cutoff wavelength is modeled by a modified high density theory, and the quantum efficiency is predicted by scaling the free carrier absorption coefficient linearly with the doping concentration. The effect of the number of layers on detector performance and the uniformity of the detectors have been discussed. A comparison with Ge:GA photoconductive detectors suggests that a similar or even better performance may be obtainable.

Affiliated with

Also associated with

No associations

Rating

GaAs homojunction far-infrared detectors for astronomy applications 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 GaAs homojunction far-infrared detectors for astronomy applications, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and GaAs homojunction far-infrared detectors for astronomy applications will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1539042