Translator Disclaimer
6 June 1995 Development of a far-infrared detector array for FIRST based on n-type ultrapure liquid phase epitaxial gallium arsenide
Author Affiliations +
We consider a 16 X 16 pixel GaAs photoconductive detector array as a new candidate for an ESA-sponsored detector development program. A photoconductor array covering the wavelength range from 150 to 300 microns can add to the capability of the far infrared imaging spectrometer in the model payload of FIRST (far infra-red and submillimeter space telescope). The GaAs detector array is a completely new development. The spectral response of GaAs has been known for years; gallium arsenide, however, was at that time not available in a quality to bring dark current and NEP at operating temperatures around 1 K down to levels of state of the art photoconductors. Recent progress in liquid phase epitaxy led to the production of very high purity GaAs. Contamination from the growth system can now be kept below the required donor concentration leading to n-type GaAs layers. Photoluminescence spectra indicate low compensation, a vital requirement for getting effective photoconductive detectors. Layers with a thickness of a few hundred microns were recently produced. The GaAs detector is likely to become available within the next few years. The paper discusses investigations of the material and first results of sampling detector development.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Reinhard O. Katterloher, Gerd Jakob, Elisabeth Bauser, Eugene E. Haller, Thomas Henning, and Goeran L. Pilbratt "Development of a far-infrared detector array for FIRST based on n-type ultrapure liquid phase epitaxial gallium arsenide", Proc. SPIE 2475, Infrared Detectors and Instrumentation for Astronomy, (6 June 1995); doi: 10.1117/12.211243;


4x32 FIRGA array a pacesetter for a 52x32 element...
Proceedings of SPIE (August 20 1998)
GaAs BIB photodetector development for far-infrared astronomy
Proceedings of SPIE (November 03 2004)
Novel far-infrared detectors for space applications
Proceedings of SPIE (April 07 1999)
Recent results from the development of a far infrared n...
Proceedings of SPIE (September 28 1995)
Development of stressed Ge:Ga 2D array
Proceedings of SPIE (August 20 1998)

Back to Top