Coherence and nonlinearity in mechanical and josephson superconducting devices

Shun Yanai

Research output: ThesisDissertation (TU Delft)

10 Downloads (Pure)

Abstract

In this thesis, the microwave detection of mechanically compliant objects is investigated. This starts with a system of a suspended metal drum capacitively coupled to a high impedance microstrip resonator. The mechanical non-linear dissipation of the drums is studied. Next, a suspended nanowire coupled to a CPW resonator is studied. With an electrostatic drive at twice the mechanical resonance frequency, there occurs a parametric excitation of either the mechanical signal or the coupled microwave resonance frequency of the cavity. Then the microwave loss in flux-tunable resonators is investigated for future experiments. One of the goals of this project was to couple a suspended nanowire with a SQUID loop of a flux tunable cavity. Here, the dielectric loss in flux tunable resonators is studied in order to optimize the design of future devices.
Original languageEnglish
Awarding Institution
  • Delft University of Technology
Supervisors/Advisors
  • Steele, G.A., Supervisor
  • van der Zant, H.S.J., Supervisor
Award date28 Nov 2018
Print ISBNs978.90.8593.376.2
DOIs
Publication statusPublished - 2018

Keywords

  • mechanical oscillators
  • parametric excitation
  • Josephson junctions
  • SQUIDs
  • TLSs
  • cavity optomechanics
  • nanotechnology

Fingerprint Dive into the research topics of 'Coherence and nonlinearity in mechanical and josephson superconducting devices'. Together they form a unique fingerprint.

Cite this