Berlin 2012 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 34: Poster Session I (Graphene; Plasmonics and nanooptics; Coherence and coherent control in nanophotonics and plasmonics)

O 34.37: Poster

Dienstag, 27. März 2012, 18:15–21:45, Poster E

Simulation of the nonlocal optical response of metallic nanostructures — •Mathias Wand, Peter Kölling, Torsten Meier, and Jens Förstner — Department Physik and CeOPP, University of Paderborn, 33098 Paderborn, Germany

Recent developments for the theoretical description of plasmonic nanostructures have shown that nonlocal effects in the motion of electrons can have a significant influence on the optical properties [1]. We present two quantum theories for the nonlinear optical response of metals and their application to the simulation of plasmonic nanostructures: The first theory is based on the time-dependent density functional theory (TDDFT) [2]. The second theory is based on the quantum generalized Vlasov equations [3], which describe the time-evolution of the single-particle Wigner functions for a two-component plasma. Both quantum theories take nonlocal effects into account. We compare our results with those from classical hydrodynamic model calculations regarding ground-state charge distribution, linear response, nonlocality, and higher harmonic generation.

[1] J. M. McMahon, S. K. Gray, and G. C. Schatz, Phys. Rev. Lett. 103, 097403 (2009).

[2] M. Wand, T. Meier, and J. Förstner, phys. stat. sol. (b) 248, 887 (2011).

[3] Y. Zeng, W. Hoyer, J. Liu, S. W. Koch, and J. V. Moloney, Phys. Rev. B 79, 235109 (2009).