Surface plasmon polaritons at gyrotropic interfaces

Ignatyeva, Daria O.; Kalish, A. N.; Levkina, Galina Yu.; Sukhorukov, A. P.

doi:10.1103/physreva.85.043804

Cited by 19 publications

(15 citation statements)

References 23 publications

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“…Bearing in mind the importance of optical measurements of the magnetization states and its applications in domain detection [14], ultrafast dynamics probing [3], sensing [15], biosensing [16,17] and magnetometry [18], we focus our study on the peculiarities of the Faraday effect that arises from the optical and magnetic anisotropy of FeBO 3 crystal. In contrast to the recent studies that exploit the features of the nanoplasmonic [19][20][21][22][23] and nanophotonic [24][25][26] structures, we show that optical * ignatyeva@physics.msu.ru anisotropy of the crystal itself provides a powerful tool for the drastic increase of the magneto-optical effects.…”

contrasting

confidence: 92%

Birefringence-mediated enhancement of the magneto-optical activity in anisotropic magnetic crystals

Ignatyeva¹,

Voronov²,

Shilina³

et al. 2021

Preprint

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Antiferromagnets are promising for magneto-optical light control that could be performed at THz frequencies via excitation of the quasi-antiferromagnetic spin modes. However, most of the antiferromagnetic crystals possess optical anisotropy that is usually treated as an unfavorable condition for the magneto-optical measurements: optical anisotropy is known to diminish the Faraday rotation with respect to the case of the isotropic medium. Here we show that the situation could be quite opposite: a phenomenon of birefringence mediated enhancement of the magneto-optical activity appears if the orientation of the incident light linear polarization is chosen properly. The present study relies on the experimental, analytical, and numerical studies of iron borate FeBO3 crystals. We demonstrate a significant increase of the magneto-optical activity by more than 10 times for 70 • angle between light polarization and incidence plane instead of commonly-used p-or s-polarizations. It provides a unique sensitivity to the in-plane magnetization of FeBO3 that is crucial for the pumpprobe studies, magneto-optical microscopy, and others. The most important practical application of the observed phenomenon is the light modulation with up to 100% efficiency at THz frequencies. The approach is applicable to other types of birefringent crystals with the magneto-optical response.

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contrasting

confidence: 92%

Birefringence-mediated enhancement of the magneto-optical activity in anisotropic magnetic crystals

Ignatyeva¹,

Voronov²,

Shilina³

et al. 2021

Preprint

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“…This mode itself is completely insensitive to

component of the magnetic field [ 32 ]. However, if a magnetic field in polar configuration (

) is applied, the eigen polarization of the mode changes [ 36 , 37 ] and it acquires TM-components that were absent in the nonmagnetic case. In its turn, the emerged TM-components are sensitive to the switching of the direction of the

component of the external magnetic field.…”

Section: Resultsmentioning

confidence: 99%

Sensing of Surface and Bulk Refractive Index Using Magnetophotonic Crystal with Hybrid Magneto-Optical Response

Ignatyeva

Kapralov

Golovko

et al. 2021

Sensors

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We propose an all-dielectric magneto-photonic crystal with a hybrid magneto-optical response that allows for the simultaneous measurements of the surface and bulk refractive index of the analyzed substance. The approach is based on two different spectral features of the magneto-optical response corresponding to the resonances in p- and s-polarizations of the incident light. Angular spectra of p-polarized light have a step-like behavior near the total internal reflection angle which position is sensitive to the bulk refractive index. S-polarized light excites the TE-polarized optical Tamm surface mode localized in a submicron region near the photonic crystal surface and is sensitive to the refractive index of the near-surface analyte. We propose to measure a hybrid magneto-optical intensity modulation of p-polarized light obtained by switching the magnetic field between the transverse and polar configurations. The transversal component of the external magnetic field is responsible for the magneto-optical resonance near total internal reflection conditions, and the polar component reveals the resonance of the Tamm surface mode. Therefore, both surface- and bulk-associated features are present in the magneto-optical spectra of the p-polarized light.

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“…It is important that the presence of the interface of the materials and the corresponding boundary conditions for the electromagnetic field also impose restrictions on the Faraday-like rotation of the polarization during the propagation along the surface. 55 Thus quasi-TM and quasi-TE modes appear in the magnetized medium. The refractive indices of the quasi-TM and quasi-TE modes remain the same as for the non-magnetic case.…”

Section: The Faraday Effect With Localized and Lattice Modesmentioning

confidence: 99%

Magneto-optics of the 2D iron-garnet nanocylinder array with localized and lattice modes

E.¹,

Ignatyeva²,

Karki³

et al. 2021

Preprint

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We experimentally show the enhancement of the Faraday and transverse magnetooptical Kerr effects in the two-dimensional arrays of nanocylinders made of bismuthsubstituted iron-garnet and supporting both localized and lattice modes. Simultaneous excitation of these modes makes it possible to increase the Faraday rotation by 3 times and TMOKE by an order of magnitude compared to the smooth magnetic film of the equal effective thickness. Both magneto-optical effects are enhanced in wide spectral and angular ranges making the nanocylinder array magnetic dielectric structures promising for applications with short and tightly-focused laser pulses.

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Surface plasmon polaritons at gyrotropic interfaces

Cited by 19 publications

References 23 publications

Birefringence-mediated enhancement of the magneto-optical activity in anisotropic magnetic crystals

Birefringence-mediated enhancement of the magneto-optical activity in anisotropic magnetic crystals

Sensing of Surface and Bulk Refractive Index Using Magnetophotonic Crystal with Hybrid Magneto-Optical Response

Magneto-optics of the 2D iron-garnet nanocylinder array with localized and lattice modes

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