Hadfield, R.H. , Miller, A.J., Nam, S.W., Kautz, R.L. and Schwall, R.E. (2005) Low-frequency phase locking in high-inductance superconducting nanowires. Applied Physics Letters, 87(20), p. 203505. (doi: 10.1063/1.2130525)
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Abstract
Niobium nitride nanowires show considerable promise as high-speed single-photon detectors. We report the observation of an anomalous low-frequency ( ∼ 10 MHz) response in long, superconducting NbN nanowires (100 nm wide, 4 nm thick, and 500 μm long). This behavior, although strikingly reminiscent of the ac Josephson effect, can be explained by a relaxation oscillation resulting from the high kinetic inductance of the type II nanowire. We simulate all of the observed effects using a simple resistive-hotspot/series-inductor model. The voltage pulses observed are indistinguishable from the pulses induced by visible photons, and our observations suggest noise-induced relaxation oscillations are one mechanism for the dark counts in photon detectors.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Hadfield, Professor Robert |
| Authors: | Hadfield, R.H., Miller, A.J., Nam, S.W., Kautz, R.L., and Schwall, R.E. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Applied Physics Letters |
| ISSN: | 0003-6951 |
| Published Online: | 08 November 2005 |
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