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Ion irradiated YBa2Cu3O7 nano-meanders for superconducting single photon detectors

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arxiv 1612.07730 v2 pith:JI66QMPS submitted 2016-12-22 cond-mat.supr-con

Ion irradiated YBa2Cu3O7 nano-meanders for superconducting single photon detectors

P. Amari , C. Feuillet-Palma , A. Jouan , F. Couedo , N. Bourlet , E. G\'eron , M. Malnou , L. M\'echin
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A. Sharafiev J. Lesueur N. Bergeal
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classification cond-mat.supr-con
keywords superconductingyba2cu3o7beendetectorsmeandersnano-meandersphotonsingle
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We report the fabrication of few hundred microns long, hundreds of nanometers wide and 30 nm thick meanders made from YBa2CU3O7. Thin films protected by a 8 nm-thick Ce02 cap layer have been patterned by high energy (a few tens of keV) oxygen ion irradiation through photoresist masks. DC and RF characterizations outline good superconducting properties of nano-meanders that could be used as Superconducting Single Photon Detectors (SSPD). By mean of a resonant method, their inductance, which mainly sets the maximum speed of these devices, has been measured on a wide range of temperature. It compares favorably with expected values calculated from the geometry of the meanders and the known London penetration depth in YBa2CU3O7.

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