Magnetization-induced second- and third-harmonic generation in magnetic thin films and nanoparticles

Division of Physics, Lomonosov Moscow State University, Moskva, Moscow, Russia
Journal of the Optical Society of America B (Impact Factor: 1.97). 01/2005; 22(1). DOI: 10.1364/JOSAB.22.000138


The results of our recent experimental studies of magnetization-induced second- and third-order nonlinear optical effects in magnetic nanostructures are surveyed. Magnetization-induced variations of the intensity, the polarization state, and the relative phase of the second-harmonic wave are studied in magnetic nanogranular films, self-assembling films with garnet nanoparticles, thin magnetic metal films, and Langmuir-Blodgett films containing rare-earth ions. The nonlinear magneto-optical Kerr effect (NOMOKE) in second-harmonic generation (SHG) from thin magnetic and granular films is shown to exceed the linear magneto-optical Kerr effect by at least 1 order of magnitude. Magnetization-induced optical third-harmonic generation (THG) is observed in thin magnetic metal films and nanogranular films. The NOMOKE in THG from these magnetic nanostructures appears to be of the same order of magnitude as the second-order NOMOKE in SHG. The NOMOKE magnetic contrast in the THG intensity is up to ~0.1 in CoxAg(1-x) nanogranular films. For the THG wave, the magnetization-induced rotation of polarization is up to 10° in thin Fe(110) films, and the relative phase shift is up to 70° in thin Co films. The studies of the magnetization-induced quadratic and cubic nonlinear-optical effects show the interconnection between the magnetic, structural, and magneto-optical properties of magnetic nanomaterials.


Available from: Andrey Fedyanin
  • [Show abstract] [Hide abstract]
    ABSTRACT: Optical second-harmonic (SH) generation in Au/Co/Au sandwich-like nanodisks is studied, using several experimental techniques, at SH frequency being close to that of the plasmon resonance in the system. The dependences of the relative amplitude and phase of the magnetization-induced SH component on the angle of incidence are found to significantly differ from those measured for a continuous Au/Co/Au trilayer film. A phenomenological description of the observed effects is proposed, with special emphasis on resonant excitation of the local plasmon modes by the nonlinear sources induced in the nanodisks.
    JETP Letters 12/2009; 90(7):504-508. DOI:10.1134/S0021364009190023 · 1.36 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The results of optical second harmonic generation (SHG) spectroscopy in an ensemble of nickel nanorods are presented. Enhancement of the magnetic nonlinear optical Kerr effect at the fundamental wavelength (750–780 nm) is observed. The effect is attributed to resonance excitation of localized surface plasmons in nickel nanorods.
    Bulletin of the Russian Academy of Sciences Physics 01/2013; 77(1). DOI:10.3103/S1062873813010152
  • [Show abstract] [Hide abstract]
    ABSTRACT: We present a review of the main results reported in the literature regarding the third-order nonlinear optical response of nanocomposite media consisting of noble metal nanoparticles surrounded by a dielectric host. This phenomenon, known as optical Kerr effect, can be characterized by the intensity-dependent complex optical index of the material or, equivalently, its complex third-order susceptibility. The theoretical basis of the linear and nonlinear optical properties of metal nanoparticles and nanocomposite media are described first. The different third-order optical phenomena which have been observed in such materials are then examined. The dependence of the nonlinear properties on morphological parameters – nature of the dielectric host, metal concentration, particle size and shape – as well as on laser excitation characteristics – wavelength, intensity, pulsewidth – will be explained and illustrated by selected experimental results. The final part points out the important role played by thermal effects in the nonlinear optical response
    03/2007: pages 461-508;
Show more