Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 49: Superconductivity: Superconducting Electronics I
TT 49.3: Vortrag
Mittwoch, 14. März 2018, 10:15–10:30, H 2053
Optical lithography implementation of a non-degenerate parametric amplifier based on two coupled Josephson junction arrays — •Patrick Winkel1, Ivan Takmakov1,2, Luca Planat2, Nataliya Maleeva1, Kiril Borisov1, Alexey V. Ustinov1,4, Wolfgang Wernsdorfer1,2,3, Nicolas Roch2, and Ioan M. Pop1 — 1Physikalisches Institut, Karlsruhe Institute of Technology, Karlsruhe, Germany — 2Institut Néel, CNRS and Université Joseph Fourier, Grenoble, France — 3Institute for Nanotechnology, Karlsruhe Institute of Technology — 4Russian Quantum Center, National University of Science and Technology MISIS, Moscow, Russia
We present the implementation of a parametric amplifier which consists of two identical, capacitively coupled Josephson junction array resonators, referred to as Dimer Josephson Junction Array Amplifier (DJJAA). In accordance to our theoretical model we observe non-degenerate amplification in excess of 20 dB, instantaneous bandwidth of approx. 10 MHz and dynamic range exceeding the single-photon regime. The field dependent critical current of the junctions, implemented in the shape of SQUIDs, allows for over 1 GHz frequency tunability. All structures are fabricated using standard two step optical lithography, making the DJJAA fabrication procedure easily accessible to a wide community.