%0 Journal Article
%T Direct detection effect in small volume hot electron bolometer mixers
%A Baselmans, J. J. A.
%A Baryshev, A.
%A Reker, S. F.
%A Hajenius, M.
%A Gao, J. R.
%A Klapwijk, T. M.
%A Vahtomin, Yu
%A Maslennikov, S.
%A Antipov, S.
%A Voronov, B.
%A Gol'tsman, G.
%J Appl. Phys. Lett.
%D 2005
%V 86
%N 16
%F Baselmans_etal2005
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=377), last updated on Mon, 17 May 2021 20:25:14 -0500
%X We measure the direct detection effect in a small volume (0.15μm×1μm×3.5nm)(0.15μm×1μm×3.5nm) quasioptical NbN phonon cooled hot electronbolometermixer at 1.6THz1.6THz. We find that the small signal sensitivity of the receiver is underestimated by 35% due to the direct detection effect and that the optimal operating point is shifted to higher bias voltages when using calibration loads of 300K300K and 77K77K. Using a 200GHz200GHzbandpass filter at 4.2K4.2K the direct detection effect virtually disappears. This has important implications for the calibration procedure of these receivers in real telescope systems.
%K HEB
%K mixer
%K direct detection effect
%R 10.1063/1.1887812
%U https://doi.org/10.1063/1.1887812
%P 163503 (1 to 3)