NbTiN/SiO2/Al tuning circuits for low-noise 1 THz SIS mixers

Authors
Jackson, BD Iosad, NN de Lange, G Baryshev, AM Laauwen, WM Gao, JR Klapwijk, TM
Citation
Bd. Jackson et al., NbTiN/SiO2/Al tuning circuits for low-noise 1 THz SIS mixers, IEEE APPL S, 11(1), 2001, pp. 653-656
Citations number
25
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
ISSN journal
10518223 → ACNP
Volume
11
Issue
1
Year of publication
2001
Part
1
Pages
653 - 656
Database
ISI
SICI code
1051-8223(200103)11:1<653:NTCFL1>2.0.ZU;2-9
Abstract
Waveguide SIS milers in which Nb/Al-AlOx/Nb tunnel junctions are integrated with NbTiN/SiO2/Al tuning circuits are shown to yield receiver noise tempe ratures as low as 565 K at 970 GHz, Analyzing the noise and gain of one suc h receiver, it is shown that the NbTiN ground plane is low-loss (< 0.6 dB) at 970 GHz, These results are in good agreement with results obtained previ ously with a quasi-optical mixer incorporating a similar tuning circuit. A decrease in sensitivity above 1 THz is attributed to increasing loss in the NbTiN.