Zmuidzinas, J. and Sharifi, F. and Van Harlingen, D. J. and Lo, K. Y. (1990) Small-Area Niobium/Aluminum Oxide/Niobium Junctions for SIS Mixers. In: Submillimetre Astronomy. Astrophysics and Space Science Library. No.158. Springer Netherlands , Dordrecht, pp. 69-70. ISBN 9789401568524. https://resolver.caltech.edu/CaltechAUTHORS:20201008-112316984
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Abstract
Submillimeter-wave SIS receivers require junctions with small RC products. The RC product can only be reduced by decreasing the thickness of the insulating barrier; however, this is generally accompanied by an increased subgap leakage current which adversely affects mixer performance. Thus, it is advantageous to choose a junction fabrication technology which produces inherently high quality barriers and low subgap leakage currents. Junctions fabricated from Nb/Al-Oxide/Nb trilayers (Gurvitch et al. 1983; Lichtenberger et al. 1988) are particularly well known in this regard, and have shown good performance when used in mm-wave mixers (Inatani et al. 1987; Pan et al. 1987). However, junction areas must be reduced to ≤ 1 µm² in order to meet impedance-matching requirements at submm wavelengths. Here we report Nb/Al-Oxide/Nb junctions which are among the smallest fabricated to date (see also Imamura and Hasuo 1988).
| Item Type: | Book Section | |||||||||
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| Additional Information: | © Springer Science+Business Media Dordrecht 1990. | |||||||||
| Subject Keywords: | Critical Current; Critical Current Density; Junction Area; Josephson Current; Radio Astronomy Observatory | |||||||||
| Series Name: | Astrophysics and Space Science Library | |||||||||
| Issue or Number: | 158 | |||||||||
| DOI: | 10.1007/978-94-015-6850-0_26 | |||||||||
| Record Number: | CaltechAUTHORS:20201008-112316984 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20201008-112316984 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 105921 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | George Porter | |||||||||
| Deposited On: | 08 Oct 2020 21:05 | |||||||||
| Last Modified: | 16 Nov 2021 18:47 |
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