TY  - JOUR
AU  - Yagoubov, P.
AU  - Kroug, M.
AU  - Merkel, H.
AU  - Kollberg, E.
AU  - Gol'tsman, G.
AU  - Svechnikov, S.
AU  - Gershenzon, E.
PY  - 1998
DA  - 1998//
TI  - Noise temperature and local oscillator power requirement of NbN phonon-cooled hot electron bolometric mixers at terahertz frequencies
T2  - Appl. Phys. Lett.
JO  - Appl. Phys. Lett.
SP  - 2814
EP  - 2816
VL  - 73
IS  - 19
KW  - NbN HEB mixers
KW  - noise temperature
KW  - local oscillator power
AB  - In this letter, the noise performance of NbN-based phonon-cooled hot electron bolometric quasioptical mixers is investigated in the 0.55–1.1 THz frequency range. The best results of the double-sideband <cd><2018>DSB<cd><2019> noise temperature are: 500 K at 640 GHz, 600 K at 750 GHz, 850 K at 910 GHz, and 1250 K at 1.1 THz. The water vapor in the signal path causes significant contribution to the measured receiver noise temperature around 1.1 THz. The devices are made from 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 typically 0.2Ï«2 um. The amount of local oscillator power absorbed in the bolometer is less than 100 nW.
UR  - https://aip.scitation.org/doi/abs/10.1063/1.122599
UR  - https://doi.org/10.1063/1.122599
DO  - 10.1063/1.122599
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=911), last updated on Tue, 25 May 2021 17:15:08 -0500
ID  - Yagoubov_etal1998
ER  -