20 May 1994 Ultrafast combined bolometric and nonbolometric infrared detector
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Electrical photoresponse measurements on a Corbino type structure with thin epitaxial YBaCuO layer have been previously reported. They showed a very fast inductive reaction (rise time <EQ 12 ps, width 29 ps), followed by the bolometric heating effect. New detector structures based on coplanar lines have been experimented with similar experimental apparatus. The performance of the different geometries of detector will be compared in terms of magnitude and sharpness of the inductive non-equilibrium voltage peek, and of bolometric relaxation constants. The influence of bias currents, incident power, and operating temperature on the photoresponse mechanisms will be discussed. The feasibility of applying this type of fast superconducting detectors to far infra-red radiation measurements has been demonstrated by using a Free Electron Laser pulses at a wavelength of 20 micrometers . The detector may be used as two simultaneous different sensors for describing very fast optical pulse: the fast part of the response voltage represents the envelope of the incident pulse, while the bolometric part is significant for the incident energy.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Anne Ghis, Jean-Claude Villegier, Maurice Nail, Philippe Gibert, Serge Striby, "Ultrafast combined bolometric and nonbolometric infrared detector", Proc. SPIE 2159, High-Temperature Superconducting Detectors: Bolometric and Nonbolometric, (20 May 1994); doi: 10.1117/12.176151; https://doi.org/10.1117/12.176151

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