Far-infrared composite bolometers using surface ION implanted Ge as an absorbing surface

El-Atawy, S. A. and Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401 1978. Far-infrared composite bolometers using surface ION implanted Ge as an absorbing surface. Infrared Physics 18 (5-6) , pp. 683-690. 10.1016/0020-0891(78)90090-8

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Abstract

Measurements of the overall optical efficiency of both single and composite element bolometers have been made. Optimisation of the impurity concentration has given single element efficiencies as high as 33%. Construction of composite bolometers using bismuth film absorbers on quartz substrates has reduced the overall efficiency even though they offer intrinsically higher optical absorption and greater surface area. We have attributed this result to a thermal mismatch between the absorber and the thermometric sensor. Experiments with surface implanted Ge substrate absorbers have produced optical efficiencies of 40%. This indicates an improved thermal transfer efficiency, which is to be expected since similar materials are used in this composite structure.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	bolometers, far infrared radiation, germanium, infrared detectors, ion implantation, bismuth, energy absorption films, infrared absorption, metal films, quartz, submillimeter waves, thermodynamic efficiency
Additional Information:	3rd International Conference on Submillimetre Waves and Their Applications, Guildford, England, 29 March - 1 April 1978
Publisher:	Elsevier
ISSN:	0020-0891
Last Modified:	21 Oct 2022 10:36
URI:	https://orca.cardiff.ac.uk/id/eprint/40715

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