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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology



Friday, 06 November 2009
(at 09:20 in room 115, Hallwachsstr. 3)
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Pyroelectric infrared detectors with high signal-to-noise ratio

Volkmar Norkus

Solid-State Electronics Lab (IFE)
Technische Universität Dresden
  Germany  






The presentation describes the layout and the basic properties of pyroelectric single-element detectors and linear arrays with up to 256 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* (500K; 10Hz; 1Hz; 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 values of the NEP for linear arrays with 128 responsive elements were smaller than 0.5 nW (128Hz).

Brief Bio:

Volkmar Norkus received his MS in electronic technology from the Technische Universität Dresden in 1981. He received his PhD in the field of infrared detectors and technology from the same university in 1985. Since 1981 he has worked on developing pyroelectric infrared detectors and special process technologies for single-element detectors, multi-spectral detectors and arrays. He has published more than 100 papers and made about 70 patents. Now he is a research project manager at the Solid-State Electronics Laboratory.

Invited by G. Cuniberti

last modified: 2018.10.24 Mi
author: webadmin