DocumentCode
773881
Title
AC Josephson effect in superconducting niobium nitride tunnel junctions at up to 2.5 THz
Author
Wicks, Michael ; Haycocks, P.R. ; Hori, Toshikazu
Author_Institution
Div. of Electr. Sci., NPL, Teddington, UK
Volume
26
Issue
9
fYear
1990
fDate
4/26/1990 12:00:00 AM
Firstpage
610
Lastpage
612
Abstract
Shapiro steps have been observed in the I-V characteristics of an NbN tunnel junction illuminated with radiation from an optically pumped far infrared laser. The maximum operating frequency which produced an observable Shapiro step was 2.53 THz. This is a four-fold increase over that previously reported for a thin film Josephson junction. Clear steps were also produced by various laser lines in the frequency range 0.6-1.8 THz.
Keywords
Josephson effect; niobium compounds; 0.6 to 1.8 THz; 2.53 THz; AC Josephson effect; I-V characteristics; NbN tunnel junction; Shapiro steps; far infrared laser; maximum operating frequency;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19900401
Filename
48786
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