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1	Fabrication of Nano Josephson Junctions Using the Femtosecond Laser Technique on High Tc Superconducting YBCO Thin films Umenne, Patrice 27 February 2018 (has links) This PhD work involves the utilization of the femtosecond laser technique to fabricate the novel S-shaped Josephson Junctions on the high - T_C superconducting YBCO thin films. Initially, it was envisaged as the title states to fabricate nano sized Josephson Junctions using this femtosecond laser technique. However in this PhD work, micron sized (1 – 2 µm) and near nano sized (500 – 800 nm) Josephson Junctions where achieved. / University of South Africa / Electrical and Mining Engineering Josephson Junction Femtsosecond laser Beam Collimation Shapiro Steps Micron Constrictions submicron constrictions nano constrictions S-shaped constrictions Critical Current ablation threshold