Interaction of optical waveguide modes with dipole-exchange surface spin waves in a Lu2.14Bi0.86Fe4.94Mg0.06O12 film

Abstract

Collinear interactions of guided light with dipole-exchange spin waves in a 4.66-μm-thick Lu2.14Bi0.86Fe4.94Mg0.06O12 single crystal film has been experimentally investigated. For all four regimes of interaction TM5→TE5, TM6→TE6, TM7→TE7, TM8→TE8 diffraction peaks had a complex ‘‘fine structure’’ indicating the splitting of the spectrum of the spin waves. Frequencies of these peaks are in good agreement with the theoretical predictions based on the numerical estimations of the strong ‘‘hybridization’’ of a magnetostatic mode with seventeen spin wave resonance modes. The analysis of the amplitudes of the diffraction peaks corresponding to different hybrid spin wave modes has shown the presence of asymmetry of the pinning conditions on the surfaces of the film.

High-intensity Brillouin light scattering by spin waves in a permalloy film under microwave resonance pumping

“…5͑c͒ and 5͑d͒. 29 in yttrium iron garnet films. Both experimental facts point to strong hybridization of standing SWR modes ͑especially SWR 2 ͒ with the propagating DE wave.…”

Magnetization pinning at a Py/Co interface measured using broadband inductive magnetometry

“…This unambiguously identifies the smaller peak as the first odd symmetry SSWM (SSWM1 in the panel). Furthermore, the BLS data indicate the presence of a dipole gap [19] in the spin wave spectrum, where the Damon-Eschbach mode repels the first dipole exchange branch [20]. Without pinning, the modes are orthogonal and should cross, and the existence of a gap indicates some small degree of asymmetric pinning at the film surfaces that modifies the symmetry of the modes.…”

Plasmon-assisted high reflectivity and strong magneto-optical Kerr effect in permalloy gratings

“…10 In particular, the TMOKE can be used as one of the channels of interaction between plasmons and spin waves with the ultimate goal to increase efficiency of optical modulators based on scattering of light on travelling spin waves. 11 Recently, an all-optical excitation and control of spin waves with a light pulse focused on a magnet have been reported showing that the spin wave wavenumber distribution is diffraction-limited. 12 This limitation can be circumvented by using magneto-plasmonic nanostructures.…”