%0 Journal Article
%T Low noise NbN superconducting hot electron bolometer mixers at 1.9 and 2.5 THz
%A Hajenius, M.
%A Baselmans, J. J. A.
%A Gao, J. R.
%A Klapwijk, T. M.
%A de Korte, P. A. J.
%A Voronov, B.
%A Gol'tsman, G.
%J Supercond. Sci. Technol.
%D 2004
%V 17
%N 5
%@ 0953-2048
%F Hajenius_etal2004
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=558), last updated on Tue, 18 May 2021 13:11:33 -0500
%X NbN phonon-cooled hot electron bolometer mixers (HEBs) have been realized with negligible contact resistance between the bolometer itself and the contact structure. Using a combination of in situ cleaning of the NbN film and the use of an additional superconducting interlayer of a 10 nm NbTiN layer between the Au of the contact structure and the NbN film superior noise temperatures have been obtained as low as 950 K at 2.5 THz and 750 K at 1.9 THz. Here we address in detail the DC characterization of these devices, the interface transparencies between the bolometers and the contacts and the consequences of these factors on the mixer performance.
%K NbN HEB mixers
%R 10.1088/0953-2048/17/5/026
%U http://stacks.iop.org/0953-2048/17/i=5/a=026?key=crossref.2534873069af97a4e5c7632cd593f69f
%U https://doi.org/10.1088/0953-2048/17/5/026
%P S224-S228