Daten zum Projekt

Phase sensitive imaging of microwave signal propagation in superconductive circuits

Initiative: Trilaterale Partnerschaften – Kooperationsvorhaben zwischen Wissenschaftler(inne)n aus der Ukraine, Russland und Deutschland
Bewilligung: 29.02.2016
Laufzeit: 3 Jahre


The central idea of this project is to develop a novel, more powerful type of LSM depicting the signal phase information. A fast optical modulator will be used to synchronize the oscillations of the laser intensity with the frequency of the probing microwave signal. The loss induced in laser illuminated area of superconductive circuit will be strongly dependent on the phase difference of the RF probing signal and the phase of the laser beam modulation. In experiment, the laser modulation frequency may be set with a small offset in respect to the microwave signal frequency, and the useful measurement signal can be detected at the differential (beating) frequency. The phase of the beating signal carries information on the phase of the microwave signal over illuminated spot. The frequency mixing is performed in the laser illuminated area, similarly to the high frequency superconductive bolometric mixers. The experimental work will be concentrated at the Laser Scanning Microscope installation at KIT in Germany. First, the necessary new components and the software modifications will be identified. Then, it is planned to upgrade the LSM installation, verify the principle of operation, and calibrate the measuring system using reference samples of the superconductive circuits. Finally, based on the experience the detection modes and data reduction in modified LSM will be optimized, and the phase-sensitive imaging of the resonance modes of the large arrays of the RF SQUIDs will be conducted.


  • Prof. Dr. Alexey Ustinov

    Karlsruher Institut für Technologie
    Physikalisches Institut

  • Dr. Alexander Zhuravel

    National Academy of Sciences of Ukraine
    B. Verkin Institute for Low Temperature Physics
    and Engineering

  • Prof. Dr. Alexandre Karpov

    National University of Science and
    Chair of Theoretical Physics
    and Quantum Technologies
    MISiS, office B 702

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