Regensburg 2025 – scientific programme

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MA: Fachverband Magnetismus

MA 20: Magnonics II

MA 20.9: Talk

Wednesday, March 19, 2025, 11:45–12:00, H16

Investigation of parallel parametric signal amplification in YIG nanostructures — •Akira Lentfert, Björn Heinz, David Breitbach, Burkard Hillebrands, and Philipp Pirro — Department of Physics and Research Center OPTIMAS, RPTU Kaiserslautern-Landau, 67663 Kaiserslautern, Germany

In the pursuit of advanced information processing beyond traditional CMOS technologies, various magnonic circuits and devices such as magnon transistors, majority gates, and half adders have been developed. However, for an extended magnonic network, a phase-conserving and sensitive amplification of spin waves is required. One of the candidates is the use of the parallel parametric pumping process. A phase-conserving signal amplification in microscopic metallic waveguides has already been demonstrated in previous works. In this work, we focus on the phase dependence of the parallel parametric amplification processes in Damon-Eschbach (DE) geometry in yttrium iron garnet (YIG) nanowaveguides for propagating spin waves. Due to the low spin-wave damping in YIG, other damping mechanisms such as radiative losses have a significant impact on the pumping processes. Time-resolved micro-focused Brillouin light scattering spectroscopy is used to study the phase-dependent amplification of short spin-wave pulses. This project has been supported by the EU Horizon research and innovation program within the SPIDER project (No. 101070417) and by DFG (TRR 173-268565370: Spin+X).

Keywords: Magnonics; Parametric pumping; Yttrium iron garnet