skip to main content

Title: Modeling of coherent ultrafast magneto-optical experiments: Light-induced molecular mean-field model

We present calculations which aim to describe coherent ultrafast magneto-optical effects observed in time-resolved pump-probe experiments. Our approach is based on a nonlinear semi-classical Drude-Voigt model and is used to interpret experiments performed on nickel ferromagnetic thin film. Within this framework, a phenomenological light-induced coherent molecular mean-field depending on the polarizations of the pump and probe pulses is proposed whose microscopic origin is related to a spin-orbit coupling involving the electron spins of the material sample and the electric field of the laser pulses. Theoretical predictions are compared to available experimental data. The model successfully reproduces the observed experimental trends and gives meaningful insight into the understanding of magneto-optical rotation behavior in the ultrafast regime. Theoretical predictions for further experimental studies are also proposed.
Authors:
 [1] ;  [2]
  1. Instituto de Física dos Materiais da Universidade do Porto, Departamento de Física et Astronomia, Rua do campo Alegre, 687, 4169-007 Porto (Portugal)
  2. Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504 BP 43 - F-67034 Strasbourg Cedex 2 (France)
Publication Date:
OSTI Identifier:
22493088
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 24; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ELECTRIC FIELDS; ELECTRONS; EXPERIMENT RESULTS; EXPERIMENTAL DATA; FERROMAGNETIC MATERIALS; LASERS; L-S COUPLING; MAGNETO-OPTICAL EFFECTS; MEAN-FIELD THEORY; NICKEL; NONLINEAR PROBLEMS; POLARIZATION; PULSES; ROTATION; SIMULATION; THIN FILMS; TIME RESOLUTION; VISIBLE RADIATION