Ultrafast oscillating-magnetic-field generation based on electronic-current dynamics

Abstract

Electronic-current dynamics play an important role in photoinduced processes and magnetooptics. We theoretically demonstrate ultrafast oscillating-magnetic-field generation based on the electronic dynamics from current carrying states irradiated by a nonhelical, linearly polarized laser field. In this driving field, the electronic currents oscillate periodically, which is attributed to the laser-induced energy shift of orbitals. These electronic currents can induce a strong spatial-localized oscillating magnetic field B(r, t) of several tens of Teslas (10 4 G) at the center of targets. The frequency of the induced magnetic field ranges from terahertz to petahertz and can be continuously adjusted by varying the driving laser intensity. The optically induced oscillating magnetic fields we demonstrated will serve as a potential tool for investigations of the ultrafast dynamics in magnetic materials and chiral media.

Rotating edge-field driven processing of chiral spin textures in racetrack devices

“…These states host fully controllable magnetic fields when irradiated by laser fields. In the case of the atomic system, magnetic flux densities up to 47 T are predicted 15 . For both the laser-excited molecular systems and the nanostructured magnetic materials, the effective magnetic fields are strongly localized and hence provide promising approaches for the local creation of nanometer-sized magnetic textures.…”

“…Hence the strength of the interaction could be manipulated spatially. (4) A different procedure uses current-carrying electronic states in atoms 15 or molecules 16 . These states host fully controllable magnetic fields when irradiated by laser fields.…”

Electronic Currents and Magnetic Fields in H2+ Induced by Coherent Resonant Bichromatic Circularly Polarized Laser Pulses: Effects of Orientation, Phase, and Helicity

“…They thus become the source of intense time-dependent internal magnetic fields generated on attosecond timescale. The induced attosecond magnetic fields have been shown to be a function of various laser pulse parameters, such as the pulse intensity, wavelength, and duration [25,26], thus providing new tools for control of ultrafast optical magnetism generation [27][28][29][30][31].…”

Principle and Applications of the Coupling of Surface Plasmons and Excitons

“…These special properties offer the possibility of breaking through the limitations of traditional optics to design integrated photonic devices with a diverse range of functions and ideal performance. With different aspects of each coupling principle, especially in nanogaps, nanoparticles, and periodic gratings, these nanostructures can lead to a new class of plasmonic nanostructures and open extraordinary potentials for diverse applications, such as detection of the biological analyte, preparation of novel two-dimensional plasmonic polaritonic devices, etc.Although it is largely explored in the research into atomic physics [27] and solid-state systems, the interaction between light and matter is one of the most important aspects of modern optical technology and plays an important role in microcavity quantum dynamics [28]. Generally, if the interaction between the emitter and its local optical environment is strong enough then the energy levels responsible for the emission are also changed, they become inextricably linked with the levels (modes) of the local optical environment.…”

“…Although it is largely explored in the research into atomic physics [27] and solid-state systems, the interaction between light and matter is one of the most important aspects of modern optical technology and plays an important role in microcavity quantum dynamics [28]. Generally, if the interaction between the emitter and its local optical environment is strong enough then the energy levels responsible for the emission are also changed, they become inextricably linked with the levels (modes) of the local optical environment.…”