Shaping non-reciprocal caustic spin-wave beams - Equipe Functional Nanostructures
Communication Dans Un Congrès Année : 2024

Shaping non-reciprocal caustic spin-wave beams

Résumé

Mastering spin waves interference at the sub-micron scale is central for the development of wave-based computing applications such as reservoir computing [1], holographic memory, or spectral analysis. The complexity of spin dynamics, inherently due to its dependence to numerous parameters, and the intricacy of magnon-magnon interactions, requires heavy computational methods, which can limit the scope of study. In this context, we developed an efficient tool to study the near-field diffraction (NFD) patterns of spin wave in homogeneous out-of-plane magnetized thin films for arbitrary distribution of excitation fields [2, 3]. In this communication, we present the adaptation of our NFD model to in-plane magnetized thin films, and reveal how caustic spin-wave beams can be directly emitted from a sharply constricted stripline. We show in particular the importance of not only meeting the suitable caustic conditions of field and frequency (see Fig. 1), but also having of a seemingly punctual source for shaping the caustic beam. Using spatially resolved micro-focused Brillouin light spectroscopy on various constriction sizes, we satisfyingly verify our predictions, and explore further the steerability as well as the caustic beams properties.
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Dates et versions

hal-04726626 , version 1 (08-10-2024)

Identifiants

  • HAL Id : hal-04726626 , version 1

Citer

V. Vlaminck, Loic Temdie, Vincent Castel, Benjamin Jungfleisch, Dinesh Wagle, et al.. Shaping non-reciprocal caustic spin-wave beams. 2024 International Conference on Microwave Magnetics, Jun 2024, Oakland, MI, United States. ⟨hal-04726626⟩
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