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- Title
Spatially inhomogeneous inverse Faraday effect provides tunable nonthermal excitation of exchange dominated spin waves.
- Authors
Krichevsky, Denis M.; Ozerov, Vladislav A.; Bel'kova, Alexandra V.; Sylgacheva, Daria A.; Kalish, Andrey N.; Evstigneeva, Svetlana A.; Pakhomov, Alexander S.; Mikhailova, Tatiana V.; Lyashko, Sergey D.; Kudryashov, Alexander L.; Semuk, Evgeny Yu.; Chernov, Alexander I.; Berzhansky, Vladimir N.; Belotelov, Vladimir I.
- Abstract
We demonstrate optical nonthermal excitation of exchange dominated spin waves of different orders in a magnetophotonic crystal. The magnetophotonic structure consists of a thin magnetic film and a Bragg stack of nonmagnetic layers to provide a proper nonuniform interference pattern of the inverse Faraday effect induced by light in the magnetic layer. We found a phenomenon of the pronounced phase slippage of the inverse Faraday effect distribution when the pump wavelength is within the photonic band gap of the structure. It allows to tune the interference pattern by a slight variation of light wavelength which results in the modification of excitation efficiency of the different order spin waves. The approach can be applied for different magnetic dielectrics expanding their application horizons for spin-wave based devices.
- Subjects
SPIN waves; FARADAY effect; SPIN exchange; PHOTONIC band gap structures; BAND gaps; MAGNETIC films; THIN films
- Publication
Nanophotonics (21928606), 2024, Vol 13, Issue 3, p299
- ISSN
2192-8606
- Publication type
Article
- DOI
10.1515/nanoph-2023-0626