Frequency Pulling and Mixing of Relaxation Oscillations in Superconducting Nanowires
Name
PhysRevApplied.9.064021.pdf
Size
2.28 MB
Format
Adobe PDF
Checksum (MD5)
128c149387cdc62598b164e97392ced7
Author(s)
Toomey, Emily Anne
Zhao, Qingyuan
McCaughan, Adam N
Berggren, Karl K
Date Issued
June 2018
Journal
Physical Review Applied
Publisher
American Physical Society
Citation
Toomey, Emily et al. "Frequency Pulling and Mixing of Relaxation Oscillations in Superconducting Nanowires." Physical Review Applied 9, 6 (June 2018): 064021 © 2018 American Physical Society
Version
Final published version
Abstract
Many superconducting technologies such as rapid single-flux quantum computing and superconducting quantum-interference devices rely on the modulation of nonlinear dynamics in Josephson junctions for functionality. More recently, however, superconducting devices have been developed based on the switching and thermal heating of nanowires for use in fields such as single-photon detection and digital logic. In this paper, we use resistive shunting to control the nonlinear heating of a superconducting nanowire and compare the resulting dynamics to those observed in Josephson junctions. We show that interaction of the hotspot-impedance with an external shunt produces high-frequency relaxation oscillations with similar behavior to that observed in Josephson junctions due to their ability to be modulated by a weak periodic signal. In particular, we use a microwave drive to pull and mix the oscillation frequency, resulting in phase-locked features that resemble the Shapiro steps observed in the ac Josephson effect. Microwave nanowire devices based on these conclusions have promising applications in fields such as parametric amplification and frequency mixing.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1103/PhysRevApplied.9.064021
