Sub-diffraction sub-100 ps all-optical magnetic switching by passive wavefront shaping
arXiv:1407.4010 · doi:10.1038/ncomms6839
Abstract
The recently discovered magnetization reversal driven solely by a femtosecond laser pulse has been shown to be a promising way to record information at record breaking speeds. Seeking to improve the recording density has raised intriguing fundamental question about the feasibility to combine the ultrafast temporal with sub-wavelength spatial resolution of magnetic recording. Here we report about the first experimental demonstration of sub-diffraction and sub-100 ps all-optical magnetic switching. Using computational methods we reveal the feasibility of sub-diffraction magnetic switching even for an unfocused incoming laser pulse. This effect is achieved via structuring the sample such that the laser pulse experiences a passive wavefront shaping as it couples and propagates inside the magnetic structure. Time-resolved studies with the help of photo-emission electron microscopy clearly reveal that the sub-wavelength switching with the help of the passive wave-front shaping can be pushed into sub-100 ps regime.
References in corpus (9)
- Current-driven Magnetization Reversal and Spin Wave Excitations in Co/Cu/Co Pillars
- Super-Diffusive Spin-Transport as a Mechanism of Ultrafast Demagnetization
- All-optical control of ferromagnetic thin films and nanostructures
- Laser-Induced Magnetic Nanostructures with Tunable Topological Properties
- Light-induced magnetization reversal of high-anisotropy TbCo alloy films
- Ultrafast Magneto-Acoustics in Nickel Films
- Magnetization switching by ultrashort acoustic pulses
- Ultrafast thermally induced magnetic switching in synthetic ferrimagnets
- Optical energy optimization at the nanoscale by near-field interference
Cited by in corpus (29)
- Interface-Induced Phenomena in Magnetism
- Phononic Switching of Magnetization by the Ultrafast Barnett Effect
- Advances in ultrafast plasmonics
- Picosecond Switching of Optomagnetic Tunnel Junctions
- Giant peak of the Inverse Faraday effect in the band gap of magnetophotonic crystal
- Roles of heating and helicity in ultrafast all-optical magnetization switching in TbFeCo
- All-optical switching on the nanometer scale excited and probed with femtosecond extreme ultraviolet pulses
- Magnetic switching in granular FePt layers promoted by near-field laser enhancement
- All-optical magnetization switching by two-frequency pulses using the plasmon-induced inverse Faraday effect in a magneto-plasmonic structure
- Ultrafast relaxation dynamics of the antiferrodistortive phase in Ca doped SrTiO3
- Inertial effects in ultrafast spin dynamics
- Unusual Field Dependence of Anomalous Hall Effect in Ta/TbFeCo
- Exchange scattering as the driving force for ultrafast all-optical and bias-controlled reversal in ferrimagnetic metallic structures
- High Field Anomalies of Equilibrium and Ultrafast Magnetism in Rare-Earth-Transition Metal Ferrimagnets
- Plasmon-enhanced optical control of magnetism at the nanoscale via the inverse Faraday effect
- Understanding all-optical spin switching: Comparison between experiment and theory
- Wide-field magneto-optical microscope to access quantitative magnetization dynamics with femtosecond temporal and sub-micrometer spatial resolution
- Artificial Spin Ice: A Tutorial on Design and Control of Geometry, Microstate, Magnon Dynamics & Neuromorphic Computing
- Optically induced nonreciprocity by a plasmonic pump in semiconductor wires
- Atomistic spin model of single pulse toggle switching in MnRuGa Heusler alloys
- Optically induced spin-dependent diffusive transport in the presence of spin-orbit interaction for all-optical magnetization reversal
- Demagnetizing fields in all-optical switching
- Single femtosecond laser pulse excitation of individual cobalt nanoparticles
- Pump--probe x-ray microscopy of photo-induced magnetization dynamics at MHz repetition rates
- Strongly modulated ultrafast demagnetization and magnetization precession dynamics in ferrimagnetic Gdx(CoFe)1-x alloys via 3d-4f intersublattice exchange coupling
- Influence of magnetic domain walls on all-optical magnetic toggle switching in a ferrimagnetic GdFe film
- Ultrafast demagnetization in a ferrimagnet under electromagnetic field funneling
- One-dimensional optomagnonic microcavities for selective excitation of perpendicular standing spin waves
- Magneto-Plasmonics and Resonant Interaction of Light with Dynamic Magnetisation in Metallic and All-Dielectric Nanostructures (Review)