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Proceedings Paper

Migrating from superconducting to semiconducting YBCO thin film bolometers as future far-infrared imaging pixels
Author(s): Vishal S. Jagtap; Mattia Longhin; Mukesh K. Kulsreshath; Alain J. Kreisler; Annick F. Dégardin
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Paper Abstract

YBa2Cu3O6+x compounds are well known to exhibit superconducting properties for x > 0.5 and semiconducting properties for lower oxygen content. Superconducting YBCO was obtained commercially; the semiconducting material was deposited by sputtering at room temperature. In order to migrate from superconducting to uncooled semiconducting far-infrared bolometer technologies, we have first realized and compared the performance of 2 × 2 pixel arrays made from both materials deposited on MgO substrates. Pixels were in the shape of meanders, embedded in an area of about 1 mm2. Pixel detectivity and thermal crosstalk were studied in the 1 Hz to 100 kHz modulation frequency range by using a 850 nm solid state laser. Secondly we have improved the geometry of semiconducting YBCO bolometers fabricated on silicon substrates, in order to match their impedance with the impedance of the antenna required for working in the THz range. First optical results are also presented, where both regular bolometric and pyroelectric responses are exhibited.

Paper Details

Date Published: 27 April 2010
PDF: 9 pages
Proc. SPIE 7671, Terahertz Physics, Devices, and Systems IV: Advanced Applications in Industry and Defense, 76710X (27 April 2010); doi: 10.1117/12.850161
Show Author Affiliations
Vishal S. Jagtap, SUPELEC, LGEP, CNRS, Univ. Paris Sud 11 (France)
Mattia Longhin, SUPELEC, LGEP, CNRS, Univ. Paris Sud 11 (France)
Mukesh K. Kulsreshath, SUPELEC, LGEP, CNRS, Univ. Paris Sud 11 (France)
Alain J. Kreisler, SUPELEC, LGEP, CNRS, Univ. Paris Sud 11 (France)
Annick F. Dégardin, SUPELEC, LGEP, CNRS, Univ. Paris Sud 11 (France)


Published in SPIE Proceedings Vol. 7671:
Terahertz Physics, Devices, and Systems IV: Advanced Applications in Industry and Defense
Mehdi Anwar; Nibir K. Dhar; Thomas W. Crowe, Editor(s)

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