%0 Journal Article
%T Reduced noise in NbN hot-electron bolometer mixers by annealing
%A Yang, Z. Q.
%A Hajenius, M.
%A Baselmans, J. J. A.
%A Gao, J. R.
%A Voronov, B.
%A Gol’tsman, G. N.
%J Supercond. Sci. Technol.
%D 2006
%V 19
%N 4
%@ 0953-2048
%F Yang_etal2006
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1456), last updated on Sun, 16 May 2021 22:02:04 -0500
%X We find that the sensitivity of heterodyne receivers based on superconducting hot-electron bolometers (HEBs) increases by 25–30% after annealing at 85 °C in vacuum. The devices studied are twin-slot antenna coupled mixers with a small NbN bridge of 1 × 0.15 µm2. We show that annealing changes the device properties as reflected in sharper resistive transitions of the complete device, apparently reducing the device-related noise. The lowest receiver noise temperature of 700 K is measured at a local oscillator frequency of 1.63 THz and a bath temperature of 4.3 K.
%K NbN HEB mixers
%R 10.1088/0953-2048/19/4/L01
%U https://iopscience.iop.org/article/10.1088/0953-2048/19/4/L01
%U https://doi.org/10.1088/0953-2048/19/4/L01
%P L (9 to 12)