%0 Journal Article
%T Heterodyne measurements of a NbN superconducting hot electron mixer at terahertz frequencies
%A Yagoubov, P.
%A Kroug, M.
%A Merkel, H.
%A Kollberg, E.
%A Schubert, J.
%A Hubers, H-W
%A Schwaab, G.
%A Gol'tsman, G.
%A Gershenzon, E.
%J IEEE Trans. Appl. Supercond.
%D 1999
%V 9
%N 2
%@ 1051-8223
%F Yagoubov_etal1999
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1569), last updated on Tue, 25 May 2021 12:36:21 -0500
%X The performance of a NbN based phonon-cooled Hot Electron Bolometric (HEB) quasioptical mixer is investigated in the 0.65-3.12 THz frequency range. The device is made from a 3 nm thick NbN film on high resistivity Si and integrated with a planar spiral antenna on the same substrate. The in-plane dimensions of the bolometer strip are 0.2/spl times/2 /spl mu/m. The best results of the DSB noise temperature at 1.5 GHz IF frequency obtained with one device are: 1300 K at 650 GHz, 4700 K at 2.5 THz and 10000 K at 3.12 THz. The measurements were performed at 4.5 K ambient temperature. The amount of local oscillator (LO) power absorbed in the bolometer is about 100 nW. The mixer is linear to within 1 dB compression up to the signal level 10 dB below that of the LO. The intrinsic single sideband conversion gain measured at 650 GHz is -9 dB, the total conversion gain is -14 dB.
%K NbN HEB mixers
%R 10.1109/77.783845
%U http://ieeexplore.ieee.org/document/783845/
%U https://doi.org/10.1109/77.783845
%P 3757-3760