Femtosecond time-resolved Faraday rotation in thin magnetic films and magnetophotonic crystals

Abstract

Femtosecond time-resolved Faraday rotation is studied in magnetic garnet films and magnetophotonic crystals. Femtosecond dynamics of Faraday angle governed by multiple reflection interference and Faraday effect non-reciprocity is revealed by using polarization-sensitive ultrafast correlation technique. V

Transversal magneto-optical Kerr effect in two-dimensional nickel magnetoplasmonic crystals

“…Magnetoplasmonic effects such as resonant enhancement of magneto-optical response in systems supporting either local/localized or propagating surface plasmons are intensively studied last years in various nanostructured metallic materials. [1][2][3][4][5][6] Besides, magnetoplasmonic crystals 7 are prospective media for time-domain femtosecond-scale magnetooptics similar to that in magnetophotonic crystals 8 because the mean lifetime of resonantly excited surface plasmonpolaritons (SPPs) varies from tens to hundreds of femtoseconds. 9,10 Experimental studies of magneto-optical effects in the systems supporting propagating plasmons are mainly focused on one-dimensional plasmonic gratings.…”

Ultra-wide unidirectional infrared absorber based on 1D gyromagnetic photonic crystals concatenated with general Fibonacci quasi-periodic structure in transverse magnetization

“…Gyromagnetic photonic crystals (GMPCs) [1][2][3], comprising magneto-optical materials as a kind of regulative periodic medium, have attracted much research interest recently in the optical field due to their tunable frequency-and magneticdependent physical parameters. In the presence of an external magnetic field, GMPCs display unique features, such as oneway propagation [4,5], Faraday rotation [6][7][8], chiral edge modes [9,10], photonic band gaps [11][12][13], etc. Among these properties, as a result of the magneto-optical effect, timereversal asymmetry occurs, thus giving rise to unidirectional transmission of the electromagnetic (EM) wave in GMPCs.…”

Ultrafast Faraday Rotation of Slow Light

“…(1), the rotation angle varies within the pulse. Figures 1(c) and 1(d) show the spectral dependences of the group velocity and the Faraday angle calculated for various numbers of layers in the MPC mirrors using the 4 × 4 transfer-matrix formalism [30,45,46]. The group velocity and the Faraday rotation are inversely correlated within the entire spectral region: The lower the group velocity is, the higher the Faraday rotation becomes at the same wavelength.…”