170261 20260410165450.0 doi 10.1016/j.surfin.2026.109028 sideral 148801 ART-2026-148801 eng Frechilla, Javier Universidad de Zaragoza (orcid)0009-0007-9057-3943 Anisotropy by design in superconducting Nb thin films via ultrashort-pulse laser irradiation 2026 The ability to fabricate anisotropic superconducting layers & agrave; la carte is desired in technologies such as fluxon screening or removal in field-resilient devices, flux lensing in ultra-sensitive sensors, or in templates for imprinting magnetic structures in hybrid magnetic/superconducting multilayers. In this work, laser processing is qualified as an enabling technology in the controllable fabrication of superconducting metasurfaces. Niobium thin films exposed to femtosecond ultraviolet laser pulses exhibit significant changes in their superconducting properties, directly connected with the observed surface topography, crystallite geometry, and lattice parameter modifications. On the mesoscopic scale, quasi-parallel periodic ripple structures (about 260 nm of spatial period) gradually form on the film surface by progressively increasing the laser energy per pulse, Ep. This gives way to a stepwise increase of the critical current anisotropy and magnetic flux channeling effects along the ripples. As demonstrated in our resistive and inductive measurements, these superstructures determine the electromagnetic response of the superconducting material. Time-dependent Ginzburg-Landau simulations corroborate the topographical origin of the customized anisotropy. Pulsed laser processing is promoted as a flexible, one-step, and scalable lithography-free technique for versatile surface functionalization in microelectronic superconducting technology. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/EUR/COST-Action/CA21144-SUPERQUMAP info:eu-repo/grantAgreement/ES/DGA/T54-23R info:eu-repo/grantAgreement/ES/MICINN/AEI/PID2020-113034RB-I00 info:eu-repo/grantAgreement/ES/MICIU/PID2023-146041OBC21 info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Lejeune, Nicolas Martínez, Elena (orcid)0000-0003-4839-5286 Fourneau, Emile Frechilla, Alejandro Universidad de Zaragoza Martín, Sergio Cadorim, Leonardo R. Angurel, Luis A. Universidad de Zaragoza (orcid)0000-0001-5685-2366 de la Fuente, Germán F. (orcid)0000-0002-0500-1745 Silhanek, Alejandro V. Miloševic, Milorad V. Badía-Majós, Antonio Universidad de Zaragoza (orcid)0000-0002-8753-2397 5002 515 Universidad de Zaragoza Dpto. Ingeniería Diseño Fabri. Área Ing. Procesos Fabricación 5001 065 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Cienc.Mater. Ingen.Metal. 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 87 (2026), 109028 [13 pp.] Surfaces and Interfaces 2468-0230 4658669 http://zaguan.unizar.es/record/170261/files/texto_completo.pdf Versión publicada 2608686 http://zaguan.unizar.es/record/170261/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:170261 articulos driver 2026-04-10-13:45:24 ARTICLE