1 research outputs found
High-kinetic inductance NbN films for high-quality compact superconducting resonators
Niobium nitride (NbN) is a particularly promising material for quantum
technology applications, as entails the degree of reproducibility necessary for
large-scale of superconducting circuits. We demonstrate that resonators based
on NbN thin films present a one-photon internal quality factor above 10
maintaining a high impedance (larger than 2k), with a footprint of
approximately 50x100 m and a self-Kerr nonlinearity of few tenths of
Hz. These quality factors, mostly limited by losses induced by the coupling to
two-level systems, have been maintained for kinetic inductances ranging from
tenths to hundreds of pH/square. We also demonstrate minimal variations in the
performance of the resonators during multiple cooldowns over more than nine
months. Our work proves the versatility of niobium nitride high-kinetic
inductance resonators, opening perspectives towards the fabrication of compact,
high-impedance and high-quality multimode circuits, with sizable interactions.Comment: 12 pages, 8 figure