Characterization of Doped Silicon Thermometers for Very High Sensitivity Cryogenic Bolometers
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Understanding the origin and early evolution of stars is one of the fundamental objectives of astronomy. This can be possible with observations made from space in the mid- to far-infrared and millimeter-wave part of the spectrum which require detectors with very high sensitivity. In the framework of the SPICA project and the course of developing cooled semiconductor bolometers for sub-millimeter-wave detection, typically 100 μm ≤ λ ≤ 1.5 mm, we have investigated several thermometers based on doped silicon Si:P,B. We observed an important dependence of the Si:P,B resistance to the doping densities and found potential thermometers for cryogenic detections at very low temperatures (50 mK < T < 100 mK). In addition, numerical simulations allowed us to study the thermoelectrical behavior of the potential detectors and predict a clear enhancement of the detector performances.
KeywordsDoped silicon Far-infrared Cryogenic detector
This work has been partially supported by the LabEx FOCUS ANR-11-LABX-0013.
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