Ultrafast Magneto-Optics in Nickel Magnetoplasmonic Crystals
I.A. Novikov, M. A. Kir'yanov, Polina K. Nurgalieva, М. А. Фролов, В. В. Попов, T. V. Dolgova, Andrey A. Fedyanin
Abstract
Here, we report on ultrafast all-optical modulation of the surface-plasmon (SP)-assisted transverse magneto-optical Kerr effect (TMOKE) and the reflectance in a one-dimensional nickel magnetoplasmonic crystal (MPC). A 50 fs nonresonant laser pump pulse with 7 mJ/cm2 fluence reduces the magnetization by 65%, which results in the suppression of TMOKE in the SP-resonant probe from 1.15% to 0.4%. The differential reflectance of SP-resonant probe achieves 5.5%. Besides this, it is shown that electron thermalization and relaxation in MPC are several times slower than those in the plane nickel.
Topics & Concepts
Ultrashort pulseMaterials scienceNickelFluenceKerr effectPlasmonOpticsRelaxation (psychology)FemtosecondLaserMagnetizationSurface plasmonOptoelectronicsCondensed matter physicsMagnetic fieldPhysicsPsychologyMetallurgyNonlinear systemQuantum mechanicsSocial psychologyPlasmonic and Surface Plasmon ResearchMagneto-Optical Properties and ApplicationsPhotonic and Optical Devices