Giant peak of the Inverse Faraday effect in the band gap of magnetophotonic crystal

Abstract

Optical impact on the spin system in a magnetically ordered medium provides a unique possibility for local manipulation of magnetization at subpicosecond time scales that is very promising for magnetic data processing and other magnonics applications. One of the mechanisms of the optical manipulation is related to the inverse Faraday effect (IFE). Usually the IFE is observed in crystals and magnetic films on a substrate. Here we demonstrate the IFE induced by fs-laser pulses in the magnetic film inside the magnetophotonic crystal. Spectral dependence of the IFE on the laser pulse wavelength in the band gap of the magnetophotonic crystal has a sharp peak leading to a significant enhancement of the IFE. This phenomenon is explained by strong confinement of the electromagnetic energy and angular momentum within the magnetic film. Calculated near field distribution of the IFE effective magnetic field indicates its subwavelength localization within 30 nm along the film thickness. These excited volumes can be shifted along the sample depth via e.g. changing frequency of the laser pulses. The obtained results open a way for the new applications in the areas of ultrafast spintronics and quantum information processing.

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Cited by in corpus (8)

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• Advanced Materials and Device Architectures for Magnetooptical Spatial Light Modulators
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• Heisenberg representation of nonthermal ultrafast laser excitation of magnetic precessions
• Large inverse Faraday effect for Rydberg states of free atoms and isolated donors in semiconductors
• Formulation of the orbital magnetic moment in multiorbital tight-binding models: Application to the inverse Faraday effect
• One-dimensional optomagnonic microcavities for selective excitation of perpendicular standing spin waves
• Spin-wave hybridization in bismuth iron garnet Mie spheres induced by the inverse Faraday effect