2018/02/08 by P. J. Compaijen, В. А. Малышев, V. A. Malyshev +2
Engineering · Materials Science · Physics and Astronomy · #Brillouin zone #Condensed matter physics #Excitation #Gold and Silver Nanoparticles Synthesis and Applications #Group velocity #Localized surface plasmon #Materials science #Molecular physics #Optics #Orbital Angular Momentum in Optics #Physics #Plasmon #Plasmonic and Surface Plasmon Research #Quantum mechanics #SIGNAL (programming language) #Surface plasmon #Surface plasmon polariton #Wavelength #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.97.085428
published as Phys. Rev. B 97, 085428 (2018) · 13 pages, 10 figures, to be published in PRB
arxiv created 2018/02/08 · openalex publication_date 2018/02/20 · openalex created_date 2018/02/23 · arxiv updated 2018/02/27 · openalex updated_date 2026/08/05
We theoretically investigate the time-dependent transport of a localized surface plasmon excitation through a linear array of identical and equidistantly spaced metal nanoparticles. Two different signals propagating through the array are found: one traveling with the group velocity of the surface plasmon polaritons of the system and damped exponentially, and the other running with the speed of light and decaying in a power-law fashion, as x^\ensuremath-1 and x^\ensuremath-2 for the transversal and longitudinal polarizations, respectively. The latter resembles the Sommerfeld-Brillouin forerunner and has not been identified in previous studies. The contribution of this signal dominates the plasmon transport at large distances. In addition, even though this signal is spread in the propagation direction and has the lateral dimension larger than the wavelength, the field profile close to the chain axis does not change with distance, indicating that this part of the signal is confined to the array.