In: Physical Review Letters, 2021, vol. 126, no. 15, p. 157401
Terahertz vortex beams with different superposition of the orbital angular momentum $l={\pm}1$, ${\pm}2$, ${\pm}3$, and ${\pm}4$ and spin angular momentum ${\sigma}={\pm}1$ were used to study antiferromagnetic (AFM) resonances in TbFe$_3$(BO$_3$)$_4$ and Ni$_3$TeO$_6$ single crystals. In both materials we observed a strong vortex beam dichroism for the AFM resonances that are split in ...
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In: Physical Review Letters, 2019, vol. 122, no. 23, p. 237401
Circularly polarized light with spin angular momentum is one of the most valuable probes of magnetism. We demonstrate that light beams with orbital angular momentum (OAM), or vortex beams, can also couple to magnetism exhibiting dichroisms in a magnetized medium. Resonant optical absorption in a ferrimagnetic crystal depends strongly on both the handedness of the vortex and the direction of...
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In: Physical Review B - Condensed Matter and Materials Physics, 2012, vol. 86, no. 14, p. 144112
Far-infrared spectra of ferrimagnetic Dy₃Fe₅O₁₂ single crystals have been studied in the spectral range between 12 and 700 cm⁻¹ and in a wide temperature range between 5 K and 300 K using transmission spectroscopy and rotating analyzer ellipsometry. In the temperature range below TC = 16 K for the magnetic ordering of Dy³⁺ spins, a number of ligand field and...
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In: Physical Review B - Condensed Matter and Materials Physics, 2011, vol. 83, no. 17, p. 174407
Far-infrared spectra of magnetodielectric Dy₃Fe₅O₁₂ garnet were studied using a combination of transmittance, reflectivity, and rotating analyzer ellipsometry. In addition to purely dielectric and magnetic modes, we observed several hybrid modes with a mixed magnetic and electric dipole activity. Using 4×4 matrix formalism for materials with μ(ω)≠1, we modeled the experimental...
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