Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 9: Magnonics I
MA 9.13: Talk
Monday, March 9, 2026, 18:15–18:30, HSZ/0004
Dispersion-tunable low-loss implanted spin-wave waveguides — •Jannis Bensmann1, Robert Schmidt1, Kirill O. Nikolaev3, Dmitrii Raskhodchikov1,2, Shraddha Choudhary1, Richa Bhardwaj1, Shabnam Teheriniya1,2,4, Akhil Varri1,2, Sven Niehues1, Ahmad El Kadri1, Johannes Kern1, Wolfram H. P. Pernice1,2,4, Sergej O. Demokritov3, Vladislav E. Demidov3, Steffen Michaelis de Vasconcellos1, and Rudolf Bratschitsch1 — 1University of Münster, Institute of Physics and Center for Nanotechnology, Münster, Germany — 2University of Münster, Center for Soft Nanoscience, Münster, Germany — 3University of Münster, Institute of Applied Physics, Münster, Germany — 4Heidelberg University, Kirchhoff-Institute for Physics, Heidelberg, Germany
Spin waves offer a promising pathway toward energy-efficient information processing. Here, we present an etchless fabrication method for low-loss spin-wave waveguides in thin yttrium iron garnet (YIG) films using maskless silicon ion implantation. Focused Si-ion irradiation locally amorphizes YIG to create a low-magnetization cladding, effectively confining spin waves while preserving the pristine magnetic properties of the waveguide core. Spin-wave propagation is directly imaged via Faraday rotation microscopy, revealing decay lengths exceeding 100 µm even for submicron waveguides. By tuning the implantation dose and waveguide width, we achieve precise dispersion control. Our approach enables large spin-wave networks, offering a promising route toward magnonic integrated circuits.
Keywords: spin waves; spin-wave computing; ion implantation