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

Compact Itinerant Microwave Photonics with Superconducting High-Kinetic Inductance Microstrips

Microwave photonics is a remarkably powerful system for quantum simulation and technologies, but its integration in superconducting circuits, superior in many aspects, is constrained by the long wavelengths and impedance mismatches in this platform. We introduce a solution to these difficulties via compact networks of high-kinetic inductance microstrip waveguides and coupling wires with strongly reduced phase velocities. We demonstrate broadband capabilities for superconducting microwave photonics in terms of routing, emulation and generalized linear and nonlinear networks.

Mutual and self-inductance in planarized multilayered superconductor integrated circuits: Microstrips, striplines, bends, meanders, ground plane perforations

Data are presented on mutual and self-inductance of various inductors used in multilayered superconductor integrated circuits: microstrips and striplines with widths of signal traces from 250 nm to a few micrometers, located on the same circuit layer at various distances from each other (from 250 nm to a few micrometers) and/or on different layers spaced vertically; effect of long slits in the ground plane(s) along the inductors on their mutual inductance; inductance of right-angled bends; inductance of meanders. Simple analytical expressions for mutual and self-inductance of the basic inducto…

用于量子极限行波参量放大器的高动感电感NbTiN薄膜

High kinetic inductance NbTiN films for quantum limited travelling wave parametric amplifiers

本研究优化了NbTiN薄膜的射频溅射工艺，实现了高动感电感（8.5 pH/sq）与高转变温度，并成功用于制造量子极限行波参量放大器原型，展现出良好的放大性能。