Plasmonic Modes in hybrid Josephson Junction Arrays

Abstract

We present microwave characterization measurements of Josephson junction arrays (JJAs) based on epitaxial Al-InAs quantum well heterostructure. The Josephson inductance of the constituent planar junctions can be derived by probing the low-energy plasmon modes of these devices. Applying an out-of-plane magnetic field gives rise to a Fraunhofer-like diffraction pattern, from which the current-phase relation and the effective transparency can be extracted. JJAs can be used to achieve high inductances, suitable for the implementation of quantum circuits. They also provide an excellent test-bed for studying the microscopic excitations of hybrid superconductor-semiconductor devices associated with the presence of Andreev states. Here, we demonstrate their tunability over a broad range of out-of-plane magnetic fields.

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Cite

BibTeX RIS

BibTeX

@misc{kirchner2026plasmonic,
  title = {{Plasmonic Modes in hybrid Josephson Junction Arrays}},
  author = {Alex Kirchner and Simon Feyrer and Vjeko Dimić and Johanna Berger and Davide Curcio and Giorgio Biasiol and Michael Prager and Matthias Kronseder and Dominique Bougeard and Nicola Paradiso and Christoph Strunk and Leandro Tosi},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.31069},
  eprint = {2609.31069},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.31069},
  note = {CC BY 4.0},
}

RIS

TY  - UNPB
TI  - Plasmonic Modes in hybrid Josephson Junction Arrays
AU  - Alex Kirchner
AU  - Simon Feyrer
AU  - Vjeko Dimić
AU  - Johanna Berger
AU  - Davide Curcio
AU  - Giorgio Biasiol
AU  - Michael Prager
AU  - Matthias Kronseder
AU  - Dominique Bougeard
AU  - Nicola Paradiso
AU  - Christoph Strunk
AU  - Leandro Tosi
PY  - 2026
DA  - 2026/09/25
PB  - arXiv
DO  - 10.48550/arxiv.2609.31069
UR  - https://arxiv.org/abs/2609.31069
AB  - We present microwave characterization measurements of Josephson junction arrays (JJAs) based on epitaxial Al-InAs quantum well heterostructure. The Josephson inductance of the constituent planar junctions can be derived by probing the low-energy plasmon modes of these devices. Applying an out-of-plane magnetic field gives rise to a Fraunhofer-like diffraction pattern, from which the current-phase relation and the effective transparency can be extracted. JJAs can be used to achieve high inductances, suitable for the implementation of quantum circuits. They also provide an excellent test-bed for studying the microscopic excitations of hybrid superconductor-semiconductor devices associated with the presence of Andreev states. Here, we demonstrate their tunability over a broad range of out-of-plane magnetic fields.
ER  -

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