Kooi, J. W. and Stern, J. A. and Chattopadhyay, G. and LeDuc, H. G. and Bumble, B. and Zmuidzinas, J. (1998) Low-loss NbTiN films for THz SIS mixer tuning circuts. International Journal of Infrared and Millimeter Waves, 19 (3). pp. 373-383. ISSN 0195-9271. doi:10.1023/a:1022595223782. https://resolver.caltech.edu/CaltechAUTHORS:20200728-174942088
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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.
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| Additional Information: | © 1998 Plenum Publishing Corporation. Received January 7, 1998. This work was supported in part by NASA grants NAG5-4890 and NAGW-107, NAG2-1068, the NASA/JPL Center for Space Microelectronics Technology and the Caltech Submillimeter (NSF grant AST-9615025). | ||||||||||
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| Subject Keywords: | NbTiN superconducting films, SIS junctions, Niobium bandgap | ||||||||||
| Issue or Number: | 3 | ||||||||||
| DOI: | 10.1023/a:1022595223782 | ||||||||||
| Record Number: | CaltechAUTHORS:20200728-174942088 | ||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20200728-174942088 | ||||||||||
| Official Citation: | Kooi, J.W., Stern, J.A., Chattopadhyay, G. et al. Low-Loss NbTiN Films for THz SIS Mixer Tuning Circuits. International Journal of Infrared and Millimeter Waves 19, 373–383 (1998). | ||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||
| ID Code: | 104625 | ||||||||||
| Collection: | CaltechAUTHORS | ||||||||||
| Deposited By: | Rebecca Minjarez | ||||||||||
| Deposited On: | 04 Aug 2020 15:42 | ||||||||||
| Last Modified: | 16 Nov 2021 18:33 |
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