Regensburg 2025 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 38: Superconducting Electronics: SQUIDs, Qubits, Circuit QED I

TT 38.7: Talk

Wednesday, March 19, 2025, 18:15–18:30, H32

High-temperature superconducting Josephson junctions for optical neuromorphic computing — •Elena Vinnemeier¹, Sebastian Schaper¹, Malik Ayachi², Vincent Humbert², Javier Villegas², and Ursula Wurstbauer¹ — ¹Institute of Physics, University of Münster, Münster, Germany — ²Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, Palaiseau, France

Josephson Junctions (JJ) offer a promising platform for neuromorphic computing, owing to their inherent ability to emulate key neuronal behaviours such as spiking and bursting. When coupled with high-temperature superconductors and reconfigurable interconnects, these junctions present a viable alternative to traditional CMOS-based approaches, providing a low-power solution that is both faster and more efficient. The integration of high-temperature superconductors into the JJs enhances energy efficiency while exploiting their sensitivity to external stimuli. The currently missing integrated memory element is addressed by replacing passive interconnections with active links, which can be tuned by external stimuli. Our goal is to achieve optical modulation of the critical current I_C through light irradiation. To explore this capability, we characterize semiconducting materials from the transition metal dichalcogenide (TMDCs) family in combination with superconducting JJs using Raman spectroscopy and photoluminescence (PL), contrasting their properties as a function of environmental conditions.

This project was supported by the EIC pathfinder grant No. 101130224 ’JOSEPHINE’.

Keywords: Superconductivity; Josephson Junctions; TMDC; Semiconductor