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- W2894895319 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 principal 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 light at the localized surface plasmon (LSP) resonance. 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 nanoparticle's surface. The computed laser-induced magnetic moments are sizable, of about $0.35phantom{rule{0.28em}{0ex}}{ensuremath{mu}}_{mathrm{B}}$/atom for a laser intensity of $45ifmmodetimeselsetexttimesfi{}{10}^{10}phantom{rule{0.16em}{0ex}}{mathrm{W}/mathrm{cm}}^{2}$ at LSP resonance." @default.
- W2894895319 created "2018-10-12" @default.
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- W2894895319 date "2018-10-23" @default.
- W2894895319 modified "2023-10-15" @default.
- W2894895319 title "Magnetic moment generation in small gold nanoparticles via the plasmonic inverse Faraday effect" @default.
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- W2894895319 doi "https://doi.org/10.1103/physrevb.98.134439" @default.
- W2894895319 hasPublicationYear "2018" @default.
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