With a vision that the technology for projecting spins/magnetic state on the polarization of light in a waveguide is worth developing, we have studied experimentally optical controllability of the dynamic state of magnetization, and the optical coupling between a magnetic medium and a waveguide. We describe experimental results on two-pulse control of the laser-induced magnetization precession in a ferrimagnetic GdFe thin film, as well as the evaluation of magneto-optical effect with oblique incident light through free space and a quartz prism.
We investigate the mechanism of space potential formation due to a diverging magnetic field on a rarefied weakly ionized plasma flowing supersonically by performing a hybrid simulation. Ions and neutrals are treated by the particle-based direct simulation Monte Carlo method, while electrons are treated as a fluid to save time and memory. We apply an electron continuity equation in order to treat the electron velocity independently of the ion velocity. We find the number density of ions (and electrons) distributed along the magnetic field. We also find electron rotation along the flowing direction. Since we remove the current-free condition assumed in our previous study, we find that the longitudinal variation in the space potential agrees reasonably well with our previous experimental results.
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