تقرير
Parametric generation of spin waves in nano-scaled magnonic conduits
| العنوان: | Parametric generation of spin waves in nano-scaled magnonic conduits |
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| المؤلفون: | Heinz, Björn, Mohseni, Morteza, Lentfert, Akira, Verba, Roman, Schneider, Michael, Lägel, Bert, Levchenko, Khrystyna, Brächer, Thomas, Dubs, Carsten, Chumak, Andrii V., Pirro, Philipp |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Applied Physics |
| الوصف: | The research feld of magnonics proposes a low-energy wave-logic computation technology based on spin waves to complement the established CMOS technology and provide a basis for emerging unconventional computation architectures. However, magnetic damping is a limiting factor for all-magnonic logic circuits and multi-device networks, ultimately rendering mechanisms to effciently manipulate and amplify spin waves a necessity. In this regard, parallel pumping is a versatile tool since it allows to selectively generate and amplify spin waves. While extensively studied in microscopic systems, nano-scaled systems are lacking investigation to assess the feasibility and potential future use of parallel pumping in magnonics. Here, we investigate a longitudinally magnetized 100 nm-wide magnonic nano-conduit using space and time-resolved micro-focused Brillouin-light-scattering spectroscopy. Employing parallel pumping to generate spin waves, we observe that the non-resonant excitation of dipolar spin waves is favored over the resonant excitation of short wavelength exchange spin waves. In addition, we utilize this technique to access the effective spin-wave relaxation time of an individual nano-conduit, observing a large relaxation time up to (115.0 +- 7.6) ns. Despite the significant decrease of the pumping effciency in the investigated nano-conduit, a reasonably small threshold is found rendering parallel pumping feasible on the nano-scale. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.105.144424 |
| URL الوصول: | http://arxiv.org/abs/2106.10727 |
| رقم الأكسشن: | edsarx.2106.10727 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.105.144424 |
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