%0 Conference Proceedings
%T Noise temperature and sensitivity of a NbN hot-electron mixer at frequencies from 0.7 THz to 5.2 THz
%A Schubert, J.
%A Semenov, A.
%A Gol'tsman, G.
%A Hübers, H-W
%A Schwaab, G.
%A Voronov, B.
%A Gershenzon, E.
%S Proc. 10[super:th] Int. Symp. Space Terahertz Technol.
%D 1999
%F Schubert_etal1999
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1573), last updated on Tue, 25 May 2021 13:59:32 -0500
%X We report on noise temperature measurements of a NbN phonon-cooled hot-electron bolometric mixer at different bias regimes. The device was a 3 nm thick bridge with in-plane dimensions of 1.7 x 0.2 gm 2 integrated in a complementary logarithmic spiral antenna. Measurements were performed at frequencies ranging from 0.7 THz up to 5.2 THz. The measured DSB noise temperatures are 1500 K (0.7 THz), 2200 K (1.4 THz), 2600 K (1.6 THz), 2900 K (2.5 THz), 4000 K (3.1 THz) 5600 K (4.3 THz) and 8800 K (5.2 THz). Two bias regimes are possible in order to achieve low noise temperatures. But only one of them yields sensitivity fluctuations close to the theoretical limit.
%K NbN HEB mixers
%U https://www.nrao.edu/meetings/isstt/1999.shtml
%P 190-199