Scalable nanofabrication of high-quality YBa 2 Cu 3 O 7 − δ nanowires for single-photon detectors
Résumé
The realization of superconducting single-photon detectors operating above the liquid-helium temperature is currently the focus of intense research efforts. Here, we present the fabrication of ultraclean encapsulated nanowires from commercially available thin films of YBa2Cu3O7−δ by high-energy oxygen-ion irradiation. The structured nanowires, ranging from 0.1 to 5μm in width, exhibit sharp resistive transitions to the superconducting state above 85 K. The I-V characteristics reveal that the evolution from the superconducting to the normal state shows a large voltage jump in the volt range. This demonstrates that the entire nanowire transits—a prerequisite for the development of a hot spot upon absorption of a single photon. Our results pave the way for the fabrication of YBa2Cu3O7−δ-based scalable superconducting single-photon-detection devices.
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SSPD Amari Feuillet-Palma BRIATICO PhysRevApplied.20.044025.pdf ( 2.4 Mo
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