On February 25th 2026, the 5th seminar of the JOSEPHINE project took place : Salvatore Mesoraca (Laboratoire Albert Fert, CNRS, Thales – Palaiseau, France) presented his work in a talk entitled “High-temperature superconducting quantum interference antenna”.

The Quantum Interference Antenna (QIA) is a magnetic field sensor based on arrays of superconducting quantum interference devices (SQUIDs). Unlike conventional resonant RF antennas, which are limited in size by the wavelength of the detected signal, the QIA operates through a non-resonant interaction with the magnetic component of electromagnetic waves.  By exploiting quantum interference in Josephson junctions, it enables detection over an ultra-wide frequency range (from DC up to tens of GHz). When implemented with high-temperature superconductors, QIA also allows for compact and energy-efficient cryocooling. This combination of wide bandwidth and reduced size opens new opportunities in areas where conventional antennas are fundamentally limited.

The performance of a QIA depends on the coherent operation of thousands of Josephson junctions, requiring high homogeneity across the array and demanding precise and challenging nanoscale fabrication. This seminar will introduce the QIA principle, outline its advantages over classical antennas, explore its applications in different fields and present our recent progress on QIA devices based on high-temperature cuprate YBCO and fabricated using masked ion irradiation.

You can access the full recording of this talk on the JOSEPHINE website, at this address, or under Seminars & Workshop > See previous seminars.