Magnetic switching by circular polarized laser pulses is a promising tool for an ultrafast control of magnetism without the need for external magnetic fields. A principle limitation of the spatial resolution is set by the optical diffraction limit which is a clear disadvantage in view of the trend towards nanoscale magnetic structures to achieve high density storage. Here we suggest to exploit the light-matter interaction to achieve atomistic spatial and femtosecond temporal resolutions. The idea is to drive current loops in fullerenes attached to a scanning tip by virtue of femtosecond optical vortices. Using full- edge quantum simulations we calculate the magnetic field associated with the fullerenes current loops and employ this magnetic field for ferromagnetic resonance studies on magnetic adatoms.
A. F. Schäffer, J. Wätzel, and J. Berakdar, "Optomagnetism and ultrafast spintronics via optical vortices," Proc. SPIE 9931, Spintronics IX, 99311B (Presented at SPIE Nanoscience + Engineering: August 29, 2016; Published: 26 September 2016); https://doi.org/10.1117/12.2237133.
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