Antenna-coupled superconducting hot-electron detectors
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Engineering topics
Publications and source records attributed to Karasik, B..
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Recently proposed submillimeter hot-electron direct detecors based on normal metals and superconductors rely on the thermal coupling between electrons and phonons. The sensitivity of the detectors can be greatly enhanced if the coupling is made very weak at subkelvin temperatures.
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Future space submillimeter telescopes will require large-format imaging detector arrays to perform state-of-the-art astronomical observations. A crucial issue related to a focal plane array is a readout scheme which is combatible with large numbers of cryogenic detectors elements.
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We present a new concept for a hot-electron direct detector (HEDD) capable of counting single millimeter-wave photons. The detector is based on a transition edge sensor (1-meu size bridge) made form a disordered superconducting film.
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We have measured the device length and temperature dependence of the intermediate frequency (IF) bandwidth and noise of hot-electron bolometert (HEB) mixers made from a high-T***subc*** superconductor.
We have systematically measured both the length and temperature dependence of the intermediate frequency (IF) bandwidth of hot-electron bolometer (HEB) mixer made form a high-T(sub c) superconductor (HTS).
Diffusion-cooled Nb hot-electron bolometer (HEB) mixers have the potential to simultaneously achieve high intermediate frequency (IF) bandwidths and low mixer noise temperatures for operation at THz frequencies (above the superconductive gap energy).