Lifetime of the surface magnetoplasmons in metallic nanoparticles

Abstract

We study the influence of an external magnetic field on the collective electronic excitations in metallic nanoparticles. While the usual surface plasmon corresponding to the collective oscillation of the electrons with respect to the ionic background persists in the direction parallel to the magnetic field, the components in the perpendicular plane are affected by the field and give rise to two collective modes with field-dependent frequencies, the surface magnetoplasmons. We analyze the decay of these collective excitations by their coupling to particle-hole excitations and determine how their lifetimes are modified by the magnetic field. In particular, we show that the lifetime of the usual surface plasmon is not modified by the magnetic field, while the lifetime of the two surface magnetoplasmons present a weak magnetic-field dependence. Optical spectroscopy experiments are suggested in which signatures of the surface magnetoplasmons may be observed.

11 pages, 6 figures; published version

References in corpus (6)

• Observation of intrinsic size effects in the optical response of individual gold nanoparticles
• Photothermal heterodyne imaging of individual nonfluorescent nanoclusters and nanocrystals
• Surface plasmon in metallic nanoparticles: renormalization effects due to electron-hole excitations
• Lifetime of the first and second collective excitations in metallic nanoparticles
• Spin-dependent dipole excitation in alkali-metal nanoparticles
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Cited by in corpus (9)

• Near-field Radiative Heat Transfer in Many-Body Systems
• Topological collective plasmons in bipartite chains of metallic nanoparticles
• Nonradiative limitations to plasmon propagation in chains of metallic nanoparticles
• Decay of dark and bright plasmonic modes in a metallic nanoparticle dimer
• Plasmons in two-dimensional lattices of near-field coupled nanoparticles
• Orbital magnetism in ensembles of gold nanoparticles
• Active tuning of plasmon damping via light induced magnetism
• Resonant enhancement of the near-field radiative heat transfer in nanoparticles
• Parametric amplification of magnetoplasmons in semiconductor quantum dots