Nonlinearity and wide-band parametric amplification in a (Nb,Ti)N microstrip transmission line
Abstract
The nonlinear response associated with the current dependence of the superconducting kinetic inductance was studied in capacitively shunted NbTiN microstrip transmission lines. It was found that the inductance per unit length of one microstrip line could be changed by up to 20% by applying a DC current, corresponding to a single pass time delay of 0.7 ns. To investigate nonlinear dissipation, Bragg reflectors were placed on either end of a section of this type of transmission line, creating resonances over a range of frequencies. From the change in the resonance linewidth and amplitude with DC current, the ratio of the reactive to the dissipative response of the line was found to be 788. The low dissipation makes these transmission lines suitable for a number of applications that are microwave and millimeter-wave band analogues of nonlinear optical processes. As an example, by applying a millimeter-wave pump tone, very wide band parametric amplification was observed between about 3 and 34 GHz. Use as a current variable delay line for an on-chip millimeter-wave Fourier transform spectrometer is also considered.
Additional Information
© The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Received 15 February 2021; revised 14 May 2021; accepted 19 May 2021; published 4 June 2021. The authors thank Songyuan Zhao and Eduard Driessen for help in calculations of the Usadel equation. The research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004).Attached Files
Published - PhysRevResearch.3.023184.pdf
Submitted - 2103.00656.pdf
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Additional details
- Alternative title
- Nonlinearity and wideband parametric amplification in an NbTiN microstrip transmission line
- Eprint ID
- 108965
- Resolver ID
- CaltechAUTHORS:20210504-123939650
- 80NM0018D0004
- NASA/JPL/Caltech
- Created
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2021-05-05Created from EPrint's datestamp field
- Updated
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2021-07-08Created from EPrint's last_modified field