Donetsk Physical and Technical Institute of NAS of Ukraine

Donets’k, Ukraine

Donetsk Physical and Technical Institute of NAS of Ukraine

Donets’k, Ukraine
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Dadoenkova Y.S.,Ulyanovsk State Technical University | Bentivegna F.F.L.,Brest National School of Engineering | Dadoenkova N.N.,Ulyanovsk State Technical University | Lyubchanskii I.L.,Donetsk Physical and Technical Institute of NAS of Ukraine | And 2 more authors.
Proceedings of the International Conference Days on Diffraction, DD 2016 | Year: 2016

We investigate theoretically the Goos-Hänchen shift of a Gaussian light beam reflected from a magneto-photonic heterostucture consisting of an electrooptic film, a magneto-electric film, and a nonmagnetic dielectric substrate. We show that the magneto-electric coupling increases up to several times the amplitude of the Goos-Hänchen shift of a p-(s-) polarized incident beam reflected into a s-(p-) polarized beam. Tuning of the magnetization in the magnetic film leads to a nonreciprocal sign change of the lateral shift, and tuning of the shift amplitude can be achieved through a judicious choice of the magnitude and direction of an external dc electric field applied to the system. © 2016 IEEE.


Kruglyak V.V.,University of Exeter | Davies C.S.,University of Exeter | Tkachenko V.S.,Donetsk National University | Gorobets O.Yu.,National Technical University of Ukraine | And 4 more authors.
Journal of Physics D: Applied Physics | Year: 2017

We report a theoretical study of the spin-wave band spectrum of magnonic crystals formed by stacking thin-film magnetic layers, with general assumptions about the properties of the interfaces between the layers. The use of the Barnaś-Mills magnetization boundary conditions has enabled us to systematically trace the origin of the magnonic band gaps in the spin-wave spectrum of such systems. We find that the band gaps are a ubiquitous attribute of a weakened interlayer coupling and a finite interface anisotropy (pinning). The band gaps in such systems represent a legacy of the discrete spin-wave spectrum of the individual magnetic layers periodically stacked to form the magnonic crystal rather than resulting from Bragg scattering. At the same time, magnonic crystals with band gaps due to the Bragg scattering can be described by natural boundary conditions (i.e. those maintaining continuity of the magnetization direction across the whole sample). We generalize our conclusions to systems beyond thin-film magnonic crystals and propose magnonic crystals based on the ideas of graded-index magnonics and those formed by Fano resonances as a possible way to circumvent the discovered issues. © 2017 IOP Publishing Ltd.


Dadoenkova N.N.,Ulyanovsk State Technical University | Dadoenkova Y.S.,Ulyanovsk State Technical University | Panyaev I.S.,Ulyanovsk State University | Sannikov D.G.,Ulyanovsk State University | And 3 more authors.
Proceedings of the International Conference Days on Diffraction, DD 2016 | Year: 2016

We investigate theoretically the dispersion and polarization properties of the electromagnetic waves in a magneto-optic waveguide on the substrate covered by one-dimensional photonic crystal. The numerical analysis of such a complex structure shows peculiarities in dispersion spectra of TE- and TM-modes, depending on geometrical parameters of the waveguide and photonic crystal. © 2016 IEEE.

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