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Groß F, Zelent M, Träger N, Förster J, Sanli UT, Sauter R, Decker M, Back CH, Weigand M, Keskinbora K, Schütz G, Krawczyk M, Gräfe J. Building Blocks for Magnon Optics: Emission and Conversion of Short Spin Waves. ACS NANO 2020; 14:17184-17193. [PMID: 33253544 PMCID: PMC7760108 DOI: 10.1021/acsnano.0c07076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Accepted: 11/23/2020] [Indexed: 05/31/2023]
Abstract
Magnons have proven to be a promising candidate for low-power wave-based computing. The ability to encode information not only in amplitude but also in phase allows for increased data transmission rates. However, efficiently exciting nanoscale spin waves for a functional device requires sophisticated lithography techniques and therefore, remains a challenge. Here, we report on a method to measure the full spin wave isofrequency contour for a given frequency and field. A single antidot within a continuous thin film excites wave vectors along all directions within a single excitation geometry. Varying structural parameters or introducing Dzyaloshinskii-Moriya interaction allows the manipulation and control of the isofrequency contour, which is desirable for the fabrication of future magnonic devices. Additionally, the same antidot structure is utilized as a multipurpose spin wave device. Depending on its position with respect to the microstrip antenna, it can either be an emitter for short spin waves or a directional converter for incoming plane waves. Using simulations we show that such a converter structure is capable of generating a coherent spin wave beam. By introducing a short wavelength spin wave beam into existing magnonic gate logic, it is conceivable to reduce the size of devices to the micrometer scale. This method gives access to short wavelength spin waves to a broad range of magnonic devices without the need for refined sample preparation techniques. The presented toolbox for spin wave manipulation, emission, and conversion is a crucial step for spin wave optics and gate logic.
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Affiliation(s)
- Felix Groß
- Max
Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
| | - Mateusz Zelent
- Faculty
of Physics, Adam Mickiewicz University, Poznań, 61-614 Poznań, Poland
| | - Nick Träger
- Max
Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
| | - Johannes Förster
- Max
Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
| | - Umut T. Sanli
- Max
Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
| | - Robert Sauter
- Max
Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
| | - Martin Decker
- Technical
University Munich, 85748 Garching, Germany
| | | | - Markus Weigand
- Helmholtz-Zentrum
Berlin für Materialien und Energie, 12489 Berlin, Germany
| | | | - Gisela Schütz
- Max
Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
| | - Maciej Krawczyk
- Faculty
of Physics, Adam Mickiewicz University, Poznań, 61-614 Poznań, Poland
| | - Joachim Gräfe
- Max
Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
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