Reinoud Lavrijsen

Abstract Ultrafast all-optical switching of magnetization holds great promise for next-generation spintronic memory and hybrid spintronic–photonic systems. However, most implementations so far have relied on bulky free-space optical setups, limiting scalability and practical integration. Here, as a critical step towards integrated applications, we demonstrate the single-pulse all-optical switching of magnetization within a silicon nitride photonic integrated circuit.

Abstract We introduce a hybrid plasmonic-photonic device for on-chip all-optical switching and reading of ferrimagnet bits with perpendicular magnetic anisotropy in a racetrack spintronic memory, coupled onto an indium phosphide waveguide. The device comprises V-shaped gold plasmonic nanoantennas coupled with a photonic crystal cavity, which enables switching and reading of the magnetic state of nanoscale bits by enhancing the absorbed energy density and polar magneto-optical Kerr effect locally.

Abstract In this paper, we show that magnetic skyrmion nucleation can be controlled using Ga+ ion irradiation, which manipulates the magnetic interface effects (in particular, the magnetic anisotropy and Dzyaloshinskii-Moriya interaction) that govern the stability and energy cost of skyrmions in thin-film systems. We systematically and quantitatively investigate what effect these changes have on the nucleation of magnetic skyrmions.