21 October 2015 Bolometric kinetic inductance detector technology for sub-millimeter radiometric imaging
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Radiometric sub-millimeter imaging is a candidate technology especially in security screening applications utilizing the property of radiation in the band of 0.2 – 1.0 THz to penetrate through dielectric substances such as clothing. The challenge of the passive technology is the fact that the irradiance corresponding to the blackbody radiation is very weak in this spectral band: about two orders of magnitude below that of the infrared band. Therefore the role of the detector technology is of ultimate importance to achieve sufficient sensitivity. In this paper we present results related to our technology relying on superconducting kinetic inductance detectors operating in a thermal (bolometric) mode. The detector technology is motivated by the fact that it is naturally suitable for scalable multiplexed readout systems, and operates with relatively simple cryogenics. We will review the basic concepts of the detectors, and provide experimental figures of merit. Furthermore, we will discuss the issues related to the scale-up of our detector technology into large 2D focal plane arrays.
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Juha Hassel, Juha Hassel, Andrey V. Timofeev, Andrey V. Timofeev, Visa Vesterinen, Visa Vesterinen, Hannu Sipola, Hannu Sipola, Panu Helistö, Panu Helistö, Mika Aikio, Mika Aikio, Aki Mäyrä, Aki Mäyrä, Leif Grönberg, Leif Grönberg, Arttu Luukanen, Arttu Luukanen, "Bolometric kinetic inductance detector technology for sub-millimeter radiometric imaging", Proc. SPIE 9651, Millimetre Wave and Terahertz Sensors and Technology VIII, 96510G (21 October 2015); doi: 10.1117/12.2197522; https://doi.org/10.1117/12.2197522

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