TY  - JOUR
AU  - Yagoubov, P.
AU  - Kroug, M.
AU  - Merkel, H.
AU  - Kollberg, E.
AU  - Schubert, J.
AU  - Hubers, H-W
AU  - Schwaab, G.
AU  - Gol'tsman, G.
AU  - Gershenzon, E.
PY  - 1999
DA  - 1999//
TI  - Heterodyne measurements of a NbN superconducting hot electron mixer at terahertz frequencies
T2  - IEEE Trans. Appl. Supercond.
JO  - IEEE Trans. Appl. Supercond.
SP  - 3757
EP  - 3760
VL  - 9
IS  - 2
KW  - NbN HEB mixers
AB  - 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.
SN  - 1051-8223
UR  - http://ieeexplore.ieee.org/document/783845/
UR  - https://doi.org/10.1109/77.783845
DO  - 10.1109/77.783845
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1569), last updated on Tue, 25 May 2021 12:36:21 -0500
ID  - Yagoubov_etal1999
ER  -