Antenna-coupled graphene Josephson-junction THz/mm-wave detector

Robert E. Peale; Michael S. Lodge; Ami Rathod; Kirsten L. Lina; Anna C. Bowman; Richard A. Klemm; Masahiro Ishigami; Coleman Cariker; Christopher J. Fredricksen; F. Javier Gonzalez

doi:10.1117/12.2663687

15 June 2023 Antenna-coupled graphene Josephson-junction THz/mm-wave detector

Robert E. Peale, Michael S. Lodge, Ami Rathod, Kirsten L. Lina, Anna C. Bowman, Richard A. Klemm, Masahiro Ishigami, Coleman Cariker, Christopher J. Fredricksen, F. Javier Gonzalez

Author Affiliations +

Proceedings Volume 12512, Advanced Photon Counting Techniques XVII; 1251203 (2023) https://doi.org/10.1117/12.2663687
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

Highly-sensitive broadly-tunable detectors are needed for future multi-domain sensing and quantum-information systems. Layered graphene with “magic” twist-angle between 2 - 4 sheets is superconducting below 2 K. Demonstrated Josephson junctions in this material feature very high dynamic resistance at the maximum zero-voltage current. Biased at this current, a small microwave voltage across the junction shifts the voltage-current step, which results in a large DC output voltage. A suitable antenna driven by external radiation can source the desired AC voltage across the junction. As a non-thermal mechanism, such detectors may in principle be fast, as well as sensitive. Additionally, there is a bolometric response, whose temperature coefficient of resistance we estimate to be 300%/K. Design, fabrication, response, and twist-angle tolerance for antenna-coupled, superconducting-graphene, Josephson-junction detectors of mm-wave and THz radiation are discussed.

Conference Presentation

Citation Download Citation

Robert E. Peale, Michael S. Lodge, Ami Rathod, Kirsten L. Lina, Anna C. Bowman, Richard A. Klemm, Masahiro Ishigami, Coleman Cariker, Christopher J. Fredricksen, and F. Javier Gonzalez "Antenna-coupled graphene Josephson-junction THz/mm-wave detector", Proc. SPIE 12512, Advanced Photon Counting Techniques XVII, 1251203 (15 June 2023); https://doi.org/10.1117/12.2663687

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