Spectrally Selective Detection of Short Spin Waves in Magnetoplasmonic Nanostructures via the Magneto-Optical Intensity Effect.
Autor: | Borovkova OV; Russian Quantum Center, Novaya Str. 100, Skolkovo, 143025 Moscow, Russia.; Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory, 119991 Moscow, Russia., Lutsenko SV; Russian Quantum Center, Novaya Str. 100, Skolkovo, 143025 Moscow, Russia.; Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory, 119991 Moscow, Russia., Kozhaev MA; Russian Quantum Center, Novaya Str. 100, Skolkovo, 143025 Moscow, Russia., Kalish AN; Russian Quantum Center, Novaya Str. 100, Skolkovo, 143025 Moscow, Russia.; Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory, 119991 Moscow, Russia.; NTI Center for Quantum Communications, National University of Science and Technology MISiS, Leninsky Prospekt 4, 119049 Moscow, Russia., Belotelov VI; Russian Quantum Center, Novaya Str. 100, Skolkovo, 143025 Moscow, Russia.; Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory, 119991 Moscow, Russia. |
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Jazyk: | angličtina |
Zdroj: | Nanomaterials (Basel, Switzerland) [Nanomaterials (Basel)] 2022 Jan 26; Vol. 12 (3). Date of Electronic Publication: 2022 Jan 26. |
DOI: | 10.3390/nano12030405 |
Abstrakt: | A method of spectrally selective detection of short spin waves (or magnons) by means of the transverse magneto-optical (MO) intensity effect in transmission in the magnetoplasmonic nanostructure is proposed. We considered the spin waves with a wavelength equal to or less than (by an integer number of times) the period of the plasmonic structure, that is, of the order of hundreds of nanometers or 1-2 μm. The method is based on the analysis of the MO effect spectrum versus the modulation of the sample magnetization (created by the spin wave) and related spatial symmetry breaking in the magnetic layer. The spatial symmetry breaking leads to the appearance of the MO effect modulation at the normal incidence of light in the spectral range of the optical states (the SPP and the waveguide modes) and the breaking of the antisymmetry of the effect with respect to the sign of the incidence angle of light. We reveal that the magnitude of the MO effect varies periodically depending on the spatial shift of the spin wave with respect to the plasmonic grating. The period of this modulation is equal to the period of the spin wave. All these facts allow for the detection of spin waves of a certain wavelength propagating in a nanostructure by measuring the MO response. |
Databáze: | MEDLINE |
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