%0 Journal Article
%T New results for NbN phonon-cooled hot electron bolometric mixers above 1 THz
%A Gerecht, E.
%A Musante, C. F.
%A Jian, H.
%A Yngvesson, K. S.
%A Dickinson, J.
%A Waldman, J.
%A Yagoubov, P. A.
%A Gol'tsman, G. N.
%A Voronov, B. M.
%A Gershenzon, E. M.
%J IEEE Trans. Appl. Supercond.
%D 1999
%V 9
%N 2
%@ 1051-8223
%F Gerecht_etal1999
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1568), last updated on Tue, 25 May 2021 12:32:05 -0500
%X NbN Hot Electron Bolometric (HEB) mixers have produced promising results in terms of DSB receiver noise temperature (2800 K at 1.56 THz). The LO source for these mixers is a gas laser pumped by a CO/sub 2/ laser and the device is quasi-optically coupled through an extended hemispherical lens and a self-complementary log-periodic toothed antenna. NbN HEBs do not require submicron dimensions, can be operated comfortably at 4.2 K or higher, and require LO power of about 100-500 nW. IF noise bandwidths of 5 GHz or greater have been demonstrated. The DC bias point is also not affected by thermal radiation at 300 K. Receiver noise temperatures below 1 THz are typically 450-600 K and are expected to gradually approach these levels above 1 THz as well. NbN HEB mixers thus are rapidly approaching the type of performance required of a rugged practical receiver for astronomy and remote sensing in the THz region.
%K NbN HEB mixers
%R 10.1109/77.783955
%U http://ieeexplore.ieee.org/document/783955/
%U https://doi.org/10.1109/77.783955
%P 4217-4220