Four wave-mixing in a microstrip kinetic inductance travelling wave parametric amplifier

Samuel Goldstein*, Naftali Kirsh, Elisha Svetitsky, Yuval Zamir, Ori Hachmo, Clovis Eduardo Mazzotti De Oliveira, Nadav Katz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Superconducting quantum circuits are typically operated at low temperatures (mK), necessitating cryogenic low-noise, wideband amplifiers for signal readout ultimately also compatible with room temperature electronics. While existing implementations partly meet these criteria, they suffer from certain limitations, such as rippled transmission spectra or limited dynamic range, some of which are caused by the lack of proper impedance matching. We develop a microstrip kinetic inductance traveling wave amplifier, exploiting the nonlinear kinetic inductance of tungsten-silicide for wave-mixing of the signal and a pump, and engineer the impedance to 50 ω, while decreasing the phase velocity, with benefit for the amplification. Despite losses, pumping on our device amplifies the signal by 15 dB over a 2 GHz bandwidth.

Original languageAmerican English
Article number04236
JournalApplied Physics Letters
Issue number15
StatePublished - 13 Apr 2020

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