A Physics Department Faculty Member Publishes a Scientific Paper
Asst. Prof. Dr. Safaa Mohammed Reda from the Physics Department published a scientific paper titled: “Nonlinear Optical Effects in Magnetic Plasmon Nanostructures.”
The paper appeared in the journal *Nonlinear Optics Quantum Optics*, indexed in Scopus (Q3).
The research aimed to study nonlinear optical and magnetic effects, such as the intrinsic effect of light, super-Rayleigh magnetic light scattering, and the nonlinear magnetic Kerr optical effect, in magnetic plasmonic nanostructures and in Co/Au magnetic bilayer films on a silicon surface.
The research included an investigation into the generation characteristics of second optical harmonics, the nonlinear magnetic Kerr optical effect, and the cubic effects of the intrinsic effect of light in composite plasmonic nanostructures. The study of the magnetic, optical, and nonlinear properties of these structures is of interest for their applications in magnetic recording devices, nanoelectronics, and optics.
The study revealed an increase in nonlinear refractive and absorption coefficients in the plasmon resonance region. Magnetically induced effects of super-Rayleigh scattering at the second harmonic frequency (SH) were also found in core/shell (iron oxide/gold) nanoparticles. For the first time, the formation of a magnetically induced coherent SH component was observed in an unordered array of γ-Fe₂O₃ magnetic nanoparticles. Furthermore, a qualitative difference in the angular dependencies of the reflected SH amplitude and phase was demonstrated for the first time between a two-dimensional array of (gold/cobalt/gold) nanodisks and a similar continuum three-layer film.
