A.R. Khorsand

TL;DR: The creation and real-space observation of magnetic structures with well-defined topological properties and a lateral size as low as about 150 nm are reported, generated in a thin ferrimagnetic film by ultrashort single optical laser pulses.

TL;DR: It is shown that all-optical switching with polarized femtosecond laser pulses in ferrimagnetic GdFeCo is subjected to a threshold fluence absorbed in the magnetic layer, independent of either the excitation wavelength or the polarization of the laser pulse.

TL;DR: The first experimental demonstration of saturable absorption in core-electron transitions in aluminium paves the way for investigating warm dense matter, which potentially has an important role in planetary science and the realization of inertial confinement fusion.

TL;DR: An F-scan method, newly developed in this paper, appears to be a good candidate for the spatial beam diagnostics applicable to lasers of various kinds.

TL;DR: It is demonstrated that, despite their antiferromagnetic coupling in the ground state, the Tb and Fe spins temporarily align ferromagnetically after excitation with an intense 55-fs laser pulse, after which they relax to their initial states due to the strong anisotropy in Tb.