ISSN:
1572-9559
Keywords:
NbTiN superconducting films
;
SIS junctions
;
Niobium bandgap
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Recent results at 1 THz using normal-metal tuning circuits have shown that SIS mixers can work well up to twice the gap frequency of the junction material (niobium). However, the performance at 1 THz is limited by the substantial loss in the normal metal films. For better performance superconducting films with a higher gap frequency than niobium and with low RF loss are needed. Niobium nitride has long been considered a good candidate material, but typical NbN films suffer from high RF loss. To circumvent this problem we are currently investigating the RF loss in NbTiN films, a 15K Tc compound superconductor, by incorporating them into quasi-optical slot antenna SIS devices.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022595223782
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