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Proceedings Paper

Performance improvements for pyroelectric infrared detectors
Author(s): Volkmar Norkus; Dmitri Chvedov; Gerald Gerlach; Reinhard Köhler
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Paper Abstract

The paper describes the newest layouts and the basic properties of pyroelectric single-element detectors and linear arrays with up to 512 responsive elements which are built on the basis of lithium tantalate. The research aimed to develop detectors with a signal-to-noise ratio that is as high as possible thereby ensuring optimum adjustment of the detectors to their planned application. Typical applications can be found in pyrometry, gas analysis, spectrometry and security technique. It is shown that special technologies (e. g., ion beam etching, absorption layers) are used to manufacture responsive elements for detectors with very high signal-to-noise ratios. For example, a specific detectivity D* (500 K; 10Hz; 1 Hz; τW=1) ≥ 1.5 x 109 cmHz1/2W-1 has been obtained for single-element detectors with a responsive area of [2x2] mm2. The measured peak value of the NEP for a linear array with 256 responsive elements was smaller than 0.5 nW (128 Hz). Moreover, the acceleration responsivity (disturbance variable) of the examined detectors was fundamentally reduced (factor 5) thanks to the application of new chip and detector layouts.

Paper Details

Date Published: 18 May 2006
PDF: 11 pages
Proc. SPIE 6206, Infrared Technology and Applications XXXII, 62062X (18 May 2006); doi: 10.1117/12.664389
Show Author Affiliations
Volkmar Norkus, Technische Univ. Dresden (Germany)
Dmitri Chvedov, Technische Univ. Dresden (Germany)
Gerald Gerlach, Technische Univ. Dresden (Germany)
Reinhard Köhler, DIAS Infrared GmbH (Germany)

Published in SPIE Proceedings Vol. 6206:
Infrared Technology and Applications XXXII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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