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MA: Fachverband Magnetismus

MA 16: Magnonics I

MA 16.8: Vortrag

Dienstag, 19. März 2024, 11:30–11:45, EB 107

Investigation of parallel parametric signal amplification in YIG nanostructures — •Akira Lentfert¹, Björn Heinz¹, David Breitbach¹, Carsten Dubbs², Burkard Hillebrands¹, and Philipp Pirro¹ — ¹Department of Physics and Research Center OPTIMAS, RPTU Kaiserslautern-Landau, 67663 Kaiserslautern, Germany — ²INNOVENT e.V. Technologieentwicklung, Jena, 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 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 metallic waveguides has already been demonstrated in previous works. In this work, we focus on the phase dependence of the parallel parametric pumping processes in Damon-Eschbach (DE) geometry in yttrium iron garnet (YIG) nanowaveguides. 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 obtain the pumping threshold and to study the 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