Realization of GHz-frequency impedance matching circuits for nano-scale devices

Abstract

Integrating nano-scale objects, such as single molecules or carbon nanotubes, into impedance transformers and performing radio-frequency measurements allows for high time-resolution transport measurements with improved signal-to-noise ratios. The realization of such transformers implemented with superconducting transmission lines for the 2-10 GHz frequency range is presented here. Controlled electromigration of an integrated gold break junction is used to characterize a 6 GHz impedance matching device. The real part of the RF impedance of the break junction extracted from microwave reflectometry at a maximum bandwidth of 45 MHz of the matching circuit is in good agreement with the measured direct current resistance.

References in corpus (8)

• Coplanar Waveguide Resonators for Circuit Quantum Electrodynamics
• A widely tunable parametric amplifier based on a SQUID array resonator
• Quantum phase transition in a single-molecule quantum dot
• Fast Single-Charge Sensing with an rf Quantum Point Contact
• Measurements of the Correlation Function of a Microwave Frequency Single Photon Source
• Tunneling Spectra of Individual Magnetic Endofullerene Molecules
• Intrinsic noise properties of atomic point contact displacement detectors
• On-Chip Matching Networks for Radio-Frequency Single-Electron-Transistors

Cited by in corpus (6)

• A high-sensitivity gate-based charge sensor in silicon
• Clean carbon nanotubes coupled to superconducting impedance-matching circuits
• Tunable microwave impedance matching to a high impedance source using a Josephson metamaterial
• Measurements of a Quantum Dot with an Impedance-Matching On-Chip LC Resonator at GHz Frequencies
• Electrical excitation and detection of magnetic dynamics with impedance matching
• GHz operation of a quantum point contact using stub impedance matching circuit