Application of Superconducting Hot-Electron Bolometer Mixers for Terahertz-Band Astronomy

Hiroyuki MAEZAWA  

IEICE TRANSACTIONS on Electronics   Vol.E98-C   No.3   pp.196-206
Publication Date: 2015/03/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E98.C.196
Type of Manuscript: INVITED PAPER (Special Section on Leading-Edge Applications and Fundamentals of Superconducting Sensors and Detectors)
superconducting hot-electron bolometer mixer receiver,  astrophysics,  heterodyne spectroscopy,  terahertz,  

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Recently, a next-generation heterodyne mixer detector---a hot electron bolometer (HEB) mixer employing a superconducting microbridge---has gradually opened up terahertz-band astronomy. The surrounding state-of-the-art technologies including fabrication processes, 4 K cryostats, cryogenic low-noise amplifiers, local oscillator sources, micromachining techniques, and spectrometers, as well as the HEB mixers, have played a valuable role in the development of super-low-noise heterodyne spectroscopy systems for the terahertz band. The current developmental status of terahertz-band HEB mixer receivers and their applications for spectroscopy and astronomy with ground-based, airborne, and satellite telescopes are presented.