%0 Journal Article
%T Bias Dependence of the Thermal Time Constant in Nb Superconducting Diffusion-Cooled HEB Mixers
%A Floet D. W.
%A Gao J. R.
%A Klapwijk T. M.
%A de Korte P. A. J.
%J Appl. Phys. Lett.
%D 2000
%V 77
%F FloetD.W._etal2000
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=971), last updated on Thu, 11 Feb 2021 11:28:11 -0600
%X We present an experimental study of the intermediate frequency bandwidth of a Nb diffusion-cooled hot-electron bolometer mixer for different bias voltages. The measurements show that the bandwidth increases with increasing voltage. Analysis of the data reveals that this effect is mainly caused by a decrease of the intrinsic thermal time of the mixer and that the effect of electrothermal feedback through the intermediate frequency circuit is small. The results are understood using a qualitative model, which takes into account the different effective diffusion constants in the normal and superconducting domains.
%R 10.1063/1.1287909
%U http://aip.scitation.org/doi/10.1063/1.1287909
%U https://doi.org/10.1063/1.1287909
%P 1719