Wide-band detection with high impedance Josephson junctions
The wide-band detection with Josephson Junctions is discussed, for which high impedance point contacts are optimum. We describe the fabrication of contacts of R = 100–1000Ω with I c R-values of 900-500 μV. The response to blackbody radiation is in qualitative agreement with the theory of Likharev an...
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| Veröffentlicht in: | Infrared physics 1976, Vol.16 (1), p.213-223 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The wide-band detection with Josephson Junctions is discussed, for which high impedance point contacts are optimum. We describe the fabrication of contacts of
R = 100–1000Ω with
I
c
R-values of 900-500 μV. The response to blackbody radiation is in qualitative agreement with the theory of Likharev and Semenov for wide-band detection in the presence of fluctuations. Preliminary results for a 250Ω detector are a
NEP of 3 × 10
−15 W/Hz
1
2
and a responsivity of 5 × 10
5 V W at 2.5 ± 0.8 mm wavelength. The performance is probably limited by fluctuations in the bias circuit. |
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| ISSN: | 0020-0891 |
| DOI: | 10.1016/0020-0891(76)90037-3 |