Event Description
Benjamin Jungfleisch
University of Delaware The emergent properties of hybrid systems are promising for a wide range of quantum information applications. To this end, hybrid magnonic systems based on the coupling of magnons, the elementary excitations of magnetic media, and photons have gained increased attention. Magnons are being investigated as carriers for quantumbased computation operating at GHz and THz frequencies. However, the real advantage of magnon-based systems is their reconfigurability: the manipulation of their properties via external stimuli. Here, I will discuss how the complex behavior of magnons can be manipulated through an interplay between material properties, the geometrical arrangement of patterned ferromagnetic nanostructures, and the reconfigurability of their magnetization state [1,2]. I will present the observation of emergent spin dynamics in two-dimensional lattices of strongly coupled nanomagnets and show that the interaction between the sublattices results in unique spectra attributed to each sublattice leading to distinct inter- and intralattice dynamics. Dynamic properties of these structures are studied using broadband ferromagnetic resonance and Brillouin light scattering spectroscopies. The experimental results are correlated with micromagnetic simulations. Furthermore, new opportunities arise in hybrid magnonic systems based on the coupling of magnons with photons [3]. In my presentation, I will show the direct probing of strong magnon-photon coupling using Brillouin light scattering spectroscopy in a planar geometry [4], which can be understood as an up-conversion mechanism from the microwave to the optical regime. This work was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DE-SC0020308.
References: [1] Lendinez et al., Appl. Phys. Lett. 118, 162407 (2021), [2] Lendinez et al., Nano Lett. 21, 1921 (2021), [3] A. V. Chumak et al., IEEE Trans. Magn. (early access), 10.1109/TMAG.2022.3149664, [4] M. T. Kaffash et al., arXiv:2202.12696 [cond-mat.mtrl-sci].
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