Berlin 2012 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 34: Poster Session I (Graphene; Plasmonics and nanooptics; Coherence and coherent control in nanophotonics and plasmonics)
O 34.43: Poster
Dienstag, 27. März 2012, 18:15–21:45, Poster E
Numerical study of circular dichroism in bi-chiral plasmonic crystals — •Yevgen Grynko1, Jens Förstner1, Torsten Meier1, André Radke2, Timo Gissibl2, Paul V. Braun3, and Harald Giessen2 — 1Department of Physics & CeOPP, University of Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany — 24. Physikalisches Institut, University of Stuttgart, 70569 Stuttgart, Germany — 3Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
We study the optical properties of bi-chiral plasmonic nanostructures using the Discontinuous Galerkin Time Domain method [1], utilizing its advantages in the description of nanostructures with complex shapes. We simulate experimental measurements of transmission spectra of silver helix structures presented in [2]. Our numerical results reproduce the phenomenon of selective transmission of different circular polarizations well and qualitatively agree with the experiment for all types handednesses of bi-chiral crystals. The numerical analysis of the near fields provides information towards an understanding of the effects.
[1] J. S. Hesthaven, T. Warburton, 2002, J. Comp. Phys., 181, 186-221. [2] A. Radke, T. Gissibl, T. Klotzbücher, Paul V. Braun, and H. Giessen, 2011, Adv. Mater., 23, 3018.