Tunable microwave impedance matching to a high impedance source using a Josephson metamaterial

Abstract

We report the efficient coupling of a $50\Omega$ microwave circuit to a high impedance conductor. We use an impedance transformer consisting of a $\lambda /4$ co-planar resonator whose inner conductor contains an array of superconducting quantum interference devices (SQUIDs), providing the resonator with a large and tunable lineic inductance $\mathcal{L}\sim 80{\mu }_0$, resulting in a large characteristic impedance $Z_C\sim 1\mathrm{k}\Omega$. The impedance matching efficiency is characterized by measuring the shot noise power emitted by a dc biased high resistance tunnel junction connected to the resonator. We demonstrate matching to impedances in the $15$ to $35\mathrm{k}\Omega$ range with bandwidths above $100\mathrm{MHz}$ around a resonant frequency tunable in the $4$ to $6\mathrm{GHz}$ range.

Published in Applied Physics Letters

References in corpus (10)

• A widely tunable parametric amplifier based on a SQUID array resonator
• Implementation of low-loss superinductances for quantum circuits
• Strongly disordered TiN and NbTiN s-wave superconductors probed by microwave electrodynamics
• Quantum Superinductor with Tunable Non-Linearity
• Inelastic Microwave Photon Scattering off a Quantum Impurity in a Josephson-Junction Array
• An in-situ tunable radio-frequency quantum point contact
• Electron heating in metallic resistors at sub-Kelvin temperature
• Realization of GHz-frequency impedance matching circuits for nano-scale devices
• Optimization of sample-chip design for stub-matched radio-frequency reflectometry measurements
• On-Chip Matching Networks for Radio-Frequency Single-Electron-Transistors

Cited by in corpus (6)

• Strong Coupling Cavity QED with Gate-Defined Double Quantum Dots Enabled by a High Impedance Resonator
• Progress in Superconducting Metamaterials
• Fluctuation-Dissipation Relations of a Tunnel Junction Driven by a Quantum Circuit
• Transmission lines and resonators based on quantum Hall plasmonics: electromagnetic field, attenuation and coupling to qubits
• Measurements of a Quantum Dot with an Impedance-Matching On-Chip LC Resonator at GHz Frequencies
• Finite frequency noise for Laughlin state investigated by a resonant circuit