Magnetic moment generation in small gold nanoparticles via the plasmonic inverse Faraday effect

Abstract

We theoretically investigate the creation of a magnetic moment in gold nanoparticles by circularly polarized laser light. To this end, we describe the collective electron dynamics in gold nanoparticles using a semiclassical approach based on a quantum hydrodynamic model that incorporates the prin- cipal quantum many-body and nonlocal effects, such as the electron spill-out, the Hartree potential, and the exchange and correlation effects. We use a variational approach to investigate the breathing and the dipole dynamics induced by an external electric field. We show that gold nanoparticles can build up a static magnetic moment through the interaction with a circularly polarized laser field. We analyze that the responsible physical mechanism is a plasmonic, orbital inverse Faraday effect, which can be understood from the time-averaged electron current that contains currents rotating on the nanoparticles surface. The computed laser-induced magnetic moments are sizeable, of about 0.35 muB/atom for a laser intensity of 450 GW/cm2 at plasmon resonance.

References in corpus (18)

• All-optical control of ferromagnetic thin films and nanostructures
• Nonlocal optical response in metallic nanostructures
• Resonance shifts and spill-out effects in self-consistent hydrodynamic nanoplasmonics
• Light-induced magnetization reversal of high-anisotropy TbCo alloy films
• Quantum Hydrodynamic Theory for Plasmonics: Impact of the Electron Density Tail
• Ab Initio Theory of Coherent Laser-Induced Magnetization in Metals
• Quantum hydrodynamics for plasmas -- a Thomas-Fermi theory perspective
• Current-dependent exchange-correlation potential for non-local absorption in quantum hydrodynamic theory
• Lifetime of the first and second collective excitations in metallic nanoparticles
• Breather mode in the many-electron dynamics of semiconductor quantum wells
• Multielectron dissociative ionization of molecules by intense laser radiation
• Resonant inverse Faraday effect in nanorings
• Single shot all optical switching of intrinsic micron size magnetic domains of a Pt/Co/Pt ferromagnetic stack
• Decay of dark and bright plasmonic modes in a metallic nanoparticle dimer
• High-harmonic generation in a quantum electron gas trapped in a nonparabolic and anisotropic well
• Plasmon-induced demagnetization and magnetic switching in nickel nanoparticle arrays
• Influence of the magnetic field on the plasmonic properties of transparent Ni anti-dot arrays
• Plasmonic shock waves and solitons in a nanoring

Cited by in corpus (17)

• Nanoscale magnetophotonics
• 1,000-Fold Enhancement of Light-Induced Magnetism in Plasmonic Au Nanoparticles
• Ultrafast Microscopy of a Plasmonic Spin Skyrmion
• Magnetoplasmonics: current challenges and future opportunities
• Bright Optical Eigenmode with about 1 nm ${}^3$ Volume
• Inverse-Faraday effect from the orbital angular momentum of light
• Strong transient magnetic fields induced by THz-driven plasmons in graphene disks
• Light Induced Orbital Magnetism in Metals via Inverse Faraday Effect
• Magneto-optical Kerr spectra of gold induced by spin accumulation
• Plasmon-enhanced optical control of magnetism at the nanoscale via the inverse Faraday effect
• The spinterface mechanism for the chiral-induced spin selectivity effect: A Critical Perspective
• Optomagnets in nonmagnetic plasmonic nanostructures
• Spin contribution to the inverse Faraday effect of non-magnetic metals
• Nonlinear photomagnetization in insulators
• Light-induced Orbital and Spin Magnetism in $3d$, $4d$, and $5d$ Transition Metals
• Faraday and Kerr rotation due to photoinduced orbital magnetization in two-dimensional electron gas
• Proposal to Observe Transverse Sound in Normal Liquid ${}^3$He in Aerogel