Experimental Realization of a Passive Gigahertz Frequency‐Division Demultiplexer for Magnonic Logic Networks

Heussner, Frank; Talmelli, Giacomo; Geilen, Moritz; Heinz, Björn; Brächer, Thomas; Meyer, T.; Ciubotaru, Florin; Adelmann, Christoph; Yamamoto, Kei; Serga, Alexander A.; Hillebrands, B.; Pirro, Philipp

doi:10.1002/pssr.201900695

Cited by 45 publications

(30 citation statements)

References 37 publications

(69 reference statements)

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“…This would create a wave‐based logic device with a large number of both processing units and outputs which offers an areal density much larger than the recently proposed (de)multiplexers. [ 39,40 ] Thanks to the scale invariance of demagnetization fields, further down‐scaling of the size of the magnonic DWDM is possible. In Figure 5d we demonstrate the rotation of the extended modes in nanochannels experimentally by choosing θ = 90 deg for BLS performed at an excitation frequency of 11.2 GHz.…”

Section: Resultsmentioning

confidence: 99%

Direct Observation of Worm‐Like Nanochannels and Emergent Magnon Motifs in Artificial Ferromagnetic Quasicrystals

Watanabe

Bhat

Baumgaertl

et al. 2020

Adv Funct Materials

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Quasicrystalline structures and aperiodic metamaterials find applications ranging from established consumer gadgets to potential high‐tech photonic components owing to both complex arrangements of constituents and exotic rotational symmetries. Magnonics is an evolving branch of magnetism research where information is transported via magnetization oscillations (magnons). Their control and manipulation are so far best accomplished in periodic metamaterials which exhibit properties artificially modulated on the nanoscale. They give rise to functional components, such as band stop filters, magnonic transistors and nanograting couplers. Here, spin‐wave excitations in artificial ferromagnetic quasicrystals created via aperiodic arrangement of nanoholes are studied experimentally. Their ten‐fold rotational symmetry results in multiplexed magnonic nanochannels, suggesting a width down to 50 nm inside a so‐called Conway worm. Key elements of design are emergent magnon motifs and the worm‐like features which are scale‐invariant and not present in the periodic metamaterials. By imaging wavefronts in quasicrystals, insight is gained into how the discovered features materialize as a dense wavelength division multiplexer.

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Section: Resultsmentioning

confidence: 99%

Direct Observation of Worm‐Like Nanochannels and Emergent Magnon Motifs in Artificial Ferromagnetic Quasicrystals

Watanabe

Bhat

Baumgaertl

et al. 2020

Adv Funct Materials

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“…V E. The second one is based on the utilization of caustic spin-wave beams. 379,380 Such caustic beams are nondiffractive spinwave beams with stable subwavelength transverse aperture 381 and are a consequence of the strong anisotropy of the spin-wave dispersion relation in in-plane magnetized films (cf. Sec.…”

Section: G Spin-wave Multiplexersmentioning

confidence: 99%

Introduction to Spin Wave Computing

Mahmoud¹,

Ciubotaru²,

Vanderveken³

et al. 2021

Preprint

Self Cite

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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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“…Usually, the transmission and processing of SWs in narrow waveguides [4], [5] that are often coupled [6] are considered in magnonics. Another promising line of research is the use of elements much wider than the waveguides themselves to redirect [7], [8], [9] and process SWs [10], [11], [12], [13], [14]. These elements, being multimode waveguides, can be referred to as processing blocks.…”

Section: Introductionmentioning

confidence: 99%

Self-Imaging of Spin Waves in Thin, Multimode Ferromagnetic Waveguides

2022

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Self-imaging of waves is an intriguing and spectacular effect. The phenomenon was first observed for light in 1836 by Henry Fox Talbot and to this day is the subject of research in many areas of physics, for various types of waves and in terms of different applications. This paper is a Talbot-effect study for spin waves in systems composed of a thin, ferromagnetic waveguide with a series of single-mode sources of spin waves flowing into it. The proposed systems are studied with the use of micromagnetic simulations, and the spin wave self-imaging dependencies on many parameters are examined. We formulated conditions required for the formation of self-images and suitable for experimental realization. The results of the research form the basis for the further development of self-imaging-based magnonic devices.

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Experimental Realization of a Passive Gigahertz Frequency‐Division Demultiplexer for Magnonic Logic Networks

Cited by 45 publications

References 37 publications

Direct Observation of Worm‐Like Nanochannels and Emergent Magnon Motifs in Artificial Ferromagnetic Quasicrystals

Direct Observation of Worm‐Like Nanochannels and Emergent Magnon Motifs in Artificial Ferromagnetic Quasicrystals

Introduction to Spin Wave Computing

Self-Imaging of Spin Waves in Thin, Multimode Ferromagnetic Waveguides

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