TY - JOUR
T1 - Optically Inspired Nanomagnonics with Nonreciprocal Spin Waves in Synthetic Antiferromagnets
AU - Albisetti, Edoardo
AU - Tacchi, Silvia
AU - Silvani, Raffaele
AU - Scaramuzzi, Giuseppe
AU - Finizio, Simone
AU - Wintz, Sebastian
AU - Rinaldi, Christian
AU - Cantoni, Matteo
AU - Raabe, Jörg
AU - Carlotti, Giovanni
AU - Bertacco, Riccardo
AU - Riedo, Elisa
AU - Petti, Daniela
N1 - Funding Information:
The authors thank A. Melloni, F. Morichetti, P. Laporta, and P. Biagioni for fruitful discussions and Guido Gentili for the simulations of the electrical behavior of the striplines. The research leading to these results was funded by the European Union's Horizon 2020 research and innovation programme under grant agreements number 705326, project SWING, and number 730872, project CALIPSOplus. This work was partially performed at PoliFAB, the micro- and nano-technology center of the Politecnico di Milano. Part of this work was performed at the PolLux (X07DA) endstation of the Swiss Light Source, Paul Scherrer Institut, Villigen, Switzerland. The PolLux endstation was financed by the German Minister für Bildung und Forschung (BMBF) through contracts 05KS4WE1/6 and 05KS7WE1.
Publisher Copyright:
© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2020/3/1
Y1 - 2020/3/1
N2 - Integrated optically inspired wave-based processing is envisioned to outperform digital architectures in specific tasks, such as image processing and speech recognition. In this view, spin waves represent a promising route due to their nanoscale wavelength in the gigahertz frequency range and rich phenomenology. Here, a versatile, optically inspired platform using spin waves is realized, demonstrating the wavefront engineering, focusing, and robust interference of spin waves with nanoscale wavelength. In particular, magnonic nanoantennas based on tailored spin textures are used for launching spatially shaped coherent wavefronts, diffraction-limited spin-wave beams, and generating robust multi-beam interference patterns, which spatially extend for several times the spin-wave wavelength. Furthermore, it is shown that intriguing features, such as resilience to back reflection, naturally arise from the spin-wave nonreciprocity in synthetic antiferromagnets, preserving the high quality of the interference patterns from spurious counterpropagating modes. This work represents a fundamental step toward the realization of nanoscale optically inspired devices based on spin waves.
AB - Integrated optically inspired wave-based processing is envisioned to outperform digital architectures in specific tasks, such as image processing and speech recognition. In this view, spin waves represent a promising route due to their nanoscale wavelength in the gigahertz frequency range and rich phenomenology. Here, a versatile, optically inspired platform using spin waves is realized, demonstrating the wavefront engineering, focusing, and robust interference of spin waves with nanoscale wavelength. In particular, magnonic nanoantennas based on tailored spin textures are used for launching spatially shaped coherent wavefronts, diffraction-limited spin-wave beams, and generating robust multi-beam interference patterns, which spatially extend for several times the spin-wave wavelength. Furthermore, it is shown that intriguing features, such as resilience to back reflection, naturally arise from the spin-wave nonreciprocity in synthetic antiferromagnets, preserving the high quality of the interference patterns from spurious counterpropagating modes. This work represents a fundamental step toward the realization of nanoscale optically inspired devices based on spin waves.
KW - nanomagnonics
KW - scanning probe lithography
KW - scanning transmission X-ray microscopy
KW - spin textures
KW - spin waves
KW - synthetic antiferromagnet
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U2 - 10.1002/adma.201906439
DO - 10.1002/adma.201906439
M3 - Article
C2 - 31944413
AN - SCOPUS:85078060319
VL - 32
JO - Advanced Materials
JF - Advanced Materials
SN - 0935-9648
IS - 9
M1 - 1906439
ER -