Regensburg 2022 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 37: Superconducting Electronics: SQUIDs, Qubits, Circuit QED
TT 37.6: Talk
Friday, September 9, 2022, 10:45–11:00, H22
Microwave photonics in high kinetic inductance microstrip networks — •Niklas Gaiser1, Samuel Goldstein2, Guy Pardo2, Naftali Kirsh2, Ciprian Padurariu1, Björn Kubala1,3, Nadav Katz2, and Joachim Ankerhold1 — 1ICQ and IQST, University of Ulm, Ulm, Germany — 2The Racah Institute of Physics, The Hebrew University of Jerusalem, Israel — 3Institute of Quantum Technologies, German Aerospace Center (DLR), Ulm, Germany
Microwave photonics based on superconducting circuits is a promising candidate for many quantum-technological applications. Progress towards compact integrated photonics devices in the microwave regime, however, is constrained by their long wavelengths.
Here, we discuss a solution to these difficulties via compact networks of high-kinetic inductance microstrip waveguides with strongly reduced phase velocities experimentally realized in [1]. We describe, how the Kirchhoff equations of a periodic network map to a tight-binding model, which allows a description in term of Bloch waves and band structures, to explain experimental features. The ability to employ band-structure design techniques together with the unique properties of compactness, reduced speed of light, and strong non-linear features allows the design of highly versatile on-chip microwave networks. Furthermore utilizing this platform, we present first theoretical device proposals of linear and non-linear functional units, such as beamsplitters, filters, resonators and diodes exploiting non-reciprocity.
[1] S. Goldstein, G. Pardo, N. Kirsh, N. Gaiser, C. Padurariu, B. Kubala, J. Ankerhold, and N. Katz, New J. Phys. 24 023022 (2022)