Magnetization-induced second-harmonic generation is observed in magnetic photonic-crystal microcavities. The microcavity is formed from a half-wavelength-thick Bi-substituted yttrium-iron-garnet film sandwiched between two high-finesse dielectric Bragg reflectors. The transversal nonlinear magneto-optical Kerr effect reveals itself in magnetization-induced variations of the intensity and the relative phase of the second-harmonic wave. The variations reach the factor of 4 in intensity and 180°in phase for opposite directions of the dc-magnetic field. The longitudinal and polar nonlinear magneto-optical Kerr effects manifest themselves in the considerable, up to 50°, rotation of the second-harmonic wave polarization.
Three-dimensional magnetophotonic crystals (MPCs) based on artificial opals infiltrated by yttrium iron garnet (YIG) are fabricated and their structural, optical, and nonlinear optical properties are studied. The formation of the crystalline YIG inside the opal matrix is checked by x-ray analysis. Two templates are used for the infiltration by YIG: bare opals and those covered by a thin platinum film. Optical second-harmonic generation (SHG) technique is used to study the magnetization-induced nonlinear-optical properties of the composed MPCs. A high nonlinear magneto-optical Kerr effect in the SHG intensity is observed at the edge of the photonic band gap of the MPCs.
Structural features of diamondlike metal-doped carbon films are studied by means of optical second-harmonic generation (SHG). A high interfacial sensitivity of the SHG probe and its significant enhancement in metal nanoparticles allows one to distinguish between clusterlike and amorphous atomic scale structure of carbon-metal composites. These films appear to retain a stable amorphous atomic-scale structure in a wide range of metal concentration above the percolation threshold. Atomic-to-mesoscopic scale structural transition in diamondlike metaldoped carbon films is observed, which takes place under the thermal annealing.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.