Controlling the Nonlinear Relaxation of Quantized Propagating Magnons in Nanodevices

Mohseni, Morteza; Wang, Qi; Heinz, Björn; Kewenig, M.; Schneider, Michael; Kohl, F.; Lägel, B.; Dubs, Carsten; Chumak, A. V.; Pirro, Philipp

doi:10.1103/physrevlett.126.097202

Cited by 23 publications

(13 citation statements)

References 51 publications

(71 reference statements)

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“…At approximately the same power, the intensity recorded at x = 20 m exhibits a drop reflecting an increase in the spatial decay. This indicates an onset at the threshold power P = 1 mW of the so-called nonlinear damping [26][27][28][29][30][31][32], which is associated with the energy transfer from the coherent propagating spin wave into other incoherent short-wavelength spin-wave modes. These short-wavelength spin-wave modes do not contribute to the BLS intensity and cannot be directly accessed in the experiment.…”

Section: Resultsmentioning

confidence: 99%

Interplay Between Nonlinear Spectral Shift and Nonlinear Damping of Spin Waves in Ultrathin Yttrium Iron Garnet Waveguides

Lake

Divinskiy²,

Schmidt

et al. 2022

Phys. Rev. Applied

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We use the phase-resolved imaging to directly study the nonlinear modification of the wavelength of spin waves propagating in 100-nm thick, in-plane magnetized YIG waveguides.We show that, by using moderate microwave powers, one can realize spin waves with large amplitudes corresponding to precession angles in excess of 10 degrees and nonlinear wavelength variation of up to 18% in this system. We also find that, at large precession angles, the propagation of spin waves is strongly affected by the onset of nonlinear damping, which results in a strong spatial dependence of the wavelength. This effect leads to a spatiallydependent controllability of the wavelength by the microwave power. Furthermore, it leads to the saturation of nonlinear spectral shift's effects several micrometers away from the excitation point. These findings are important for the development of nonlinear, integrated spin-wave signal-processing devices and can be used to optimize their characteristics.

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Section: Resultsmentioning

confidence: 99%

Interplay Between Nonlinear Spectral Shift and Nonlinear Damping of Spin Waves in Ultrathin Yttrium Iron Garnet Waveguides

Lake

Divinskiy²,

Schmidt

et al. 2022

Phys. Rev. Applied

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“…The perfection of nm-thin YIG LPE films has already enabled the fabrication of 50 nm wide nano-scaled conduits with spin-wave propagation decay lengths of 8 micrometer [46]. Furthermore, control of intermodal dissipation processes of strongly driven propagating spin waves in nanodevices has been achieved [47] and the first magnon-based data processing devices such as magnonic directional couplers have been realized [48], with all of these devices operating in a singlemode regime.…”

Section: B Fabrication Of Nm-thin Yig Films By Liquid Phase Epitaxymentioning

confidence: 99%

Advances in Magnetics Roadmap on Spin-Wave Computing

et al. 2022

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Magnonics addresses the physical properties of spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operation in the GHz-to-THz frequency range, utilization of nonlinear and nonreciprocal phenomena, and compatibility with CMOS are just a few of many advantages offered by magnons. Although magnonics is still primarily positioned in the academic domain, the scientific and technological challenges of the field are being extensively investigated, and many proof-of-concept prototypes have already been realized in laboratories. This roadmap is a product of the collective work of many authors that covers versatile spin-wave computing approaches, conceptual building blocks, and underlying physical phenomena. In particular, the roadmap discusses the computation operations with Boolean digital data, unconventional approaches like neuromorphic computing, and the progress towards magnon-based quantum computing. The article is organized as a collection of sub-sections grouped into seven large thematic sections. Each sub-section is prepared by one or a group of authors and concludes with a brief description of current challenges and the outlook of further development for each research direction.

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“…127,140 However, in magnetic nanostructures, 133,147 the magnon density of states (scaling with the the structure size) also decreases, which makes the "search" for secondary magnon pairs more complex. 148,149 Thus, the downscaling of magnonic nanostructures leads to a strong modification of nonlinear spin-wave physics, which offers the possibility to control (in the simplest case, switch on or off) nonlinear processes by the selection of the operating frequency and the external magnetic field. By contrast, processes (ii), which describe nonlinear frequency shifts of the spin-wave dispersion with increasing spin-wave amplitude, are typically more pronounced at the nanoscale.…”

Section: Nonlinear Spin-wave Physicsmentioning

confidence: 99%

Introduction to Spin Wave Computing

Mahmoud¹,

Ciubotaru²,

Vanderveken³

et al. 2021

Preprint

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This paper provides a tutorial overview over recent vigorous efforts to develop computing systems based on spin waves instead of charges and voltages. Spin-wave computing can be considered as a subfield of spintronics, which uses magnetic excitations for computation and memory applications. The tutorial combines backgrounds in spin-wave and device physics as well as circuit engineering to create synergies between the physics and electrical engineering communities to advance the field towards practical spin-wave circuits. After an introduction to magnetic interactions and spin-wave physics, all relevant basic aspects of spin-wave computing and individual spin-wave devices are reviewed. The focus is on spin-wave majority gates as they are the most prominently pursued device concept. Subsequently, we discuss the current status and the challenges to combine spin-wave gates and obtain circuits and ultimately computing systems, considering essential aspects such as gate interconnection, logic level restoration, input-output consistency, and fan-out achievement. We argue that spin-wave circuits need to be embedded in conventional CMOS circuits to obtain complete functional hybrid computing systems. The state of the art of benchmarking such hybrid spin-wave--CMOS systems is reviewed and the current challenges to realize such systems are discussed. The benchmark indicates that hybrid spin-wave--CMOS systems promise ultralow-power operation and may ultimately outperform conventional CMOS circuits in terms of the power-delay-area product. Current challenges to achieve this goal include low-power signal restoration in spin-wave circuits as well as efficient spin-wave transducers.

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Controlling the Nonlinear Relaxation of Quantized Propagating Magnons in Nanodevices

Cited by 23 publications

References 51 publications

Interplay Between Nonlinear Spectral Shift and Nonlinear Damping of Spin Waves in Ultrathin Yttrium Iron Garnet Waveguides

Interplay Between Nonlinear Spectral Shift and Nonlinear Damping of Spin Waves in Ultrathin Yttrium Iron Garnet Waveguides

Advances in Magnetics Roadmap on Spin-Wave Computing

Introduction to Spin Wave Computing

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