Share Email Print
cover

Proceedings Paper

Ge:Ga AND Ge:Be Photoconductive Detectors For Far Infrared Astronomy From A Space Platform
Author(s): P. R. Bratt; N N. Lewis; R. L. Nielsen
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

This paper presents the major results of a NASA supported development effort on Ge:Ga and Ge:Be photoconductive detectors for use in far infrared astronomical observations from a space platform such as IRAS. Ge:Be is useful in the wavelength range from 30- to 55-µm, and Ge:Ga from 50- to 120-µm. The theory of operation and some typical test data which represent the current state of the art are given. Under a background photon flux density on the order of 1 X 109 ph/sec/cm2, an operating temperature of 3K and a measuring frequency of 1 Hz, Ge:Be detectors achieved an NEP (40 µm) of 2 to 3 x 10-16 watt/Hz½, and Ge:Ga detectors achieved an NEP (100 µm) of about 1 X 10-16 watt/Hz 1/2. At a lower backa,round flux calculated to be 4 X 108ph/sec/cm2, one Ge:Ga detector attained an NEP (100 µm) of 5 X 10-17 watt/Hz 1/2. The reproducibility and yield of these detectors are adequate to consider their use in large focal plane arrays for far infrared astronomical observations.

Paper Details

Date Published: 6 June 1978
PDF: 13 pages
Proc. SPIE 0132, Utilization of Infrared Detectors, (6 June 1978); doi: 10.1117/12.956062
Show Author Affiliations
P. R. Bratt, Santa Barbara Research Center (United States)
N N. Lewis, Santa Barbara Research Center (United States)
R. L. Nielsen, Santa Barbara Research Center (United States)


Published in SPIE Proceedings Vol. 0132:
Utilization of Infrared Detectors
Irving J. Spiro, Editor(s)

© SPIE. Terms of Use
Back to Top