Recent progress in HTSC bolometric detectors at terahertz frequencies

Alain J. Kreisler; Alain Gaugue

doi:10.1117/12.335899

22 December 1998 Recent progress in HTSC bolometric detectors at terahertz frequencies

Alain J. Kreisler, Alain Gaugue

Proceedings Volume 3481, Superconducting and Related Oxides: Physics and Nanoengineering III; (1998) https://doi.org/10.1117/12.335899
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

Among the two categories of superconducting detectors that are actually operational for competitive performance in the submillimeter-wave/terahertz range, SIS devices used as heterodyne mixers offer very low noise level, but are frequency limited by the superconducting energy gap. Bolometric detectors on the other hand, although of lesser performance a priori, have no intrinsic frequency limitation due to their purely thermal sensing principle. Moreover, their inherent slow response can be overcome by developing hot- electron bolometer technologies based on superconducting nanostructures, that allow promising output frequencies of several GHz. In order to implement competitive submillimeter wave detectors, wideband planar antennas are preferred to improve the radiation to device coupling, rather than conventional bolometric structures (of either monolithic or composite type) that do not allow both sensitive and fast detector operation. All these aspects are commented and many realizations covering a large number of technologies, in view of both homodyne and heterodyne detection, are reviewed, commented and discussed.

Citation Download Citation

Alain J. Kreisler and Alain Gaugue "Recent progress in HTSC bolometric detectors at terahertz frequencies", Proc. SPIE 3481, Superconducting and Related Oxides: Physics and Nanoengineering III, (22 December 1998); https://doi.org/10.1117/12.335899

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