Free-electron response in reflectance anisotropy spectra

K. Fleischer, S. Chandola, Th. Herrmann, N. Esser, W. Richter, and J. F. McGilp
Phys. Rev. B 74, 195432 – Published 27 November 2006

Abstract

Reflectance anisotropy spectra (RAS), extended into the near infrared spectral region, of anisotropic metal islands, metal surfaces, and atomic nanowires are analyzed with respect to anisotropies in the optical response of the free-electron gas of such low dimensional metal structures. In order to distinguish conductivity and morphology effects, both a phenomenological anisotropic Drude model and an effective medium model using ellipsoidal metal inclusions are used to model the spectra. In some cases (metal islands) the RAS response is dominated by the free-electron contribution, while this contribution is significantly smaller for the metal surfaces and nanowires in the accessible spectral range.

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  • Received 28 March 2006

DOI:https://doi.org/10.1103/PhysRevB.74.195432

©2006 American Physical Society

Authors & Affiliations

K. Fleischer1,2,*, S. Chandola1,2, Th. Herrmann2, N. Esser3, W. Richter2,4, and J. F. McGilp1

  • 1School of Physics, Trinity College Dublin, Dublin 2, Ireland
  • 2Technische Universität Berlin, Institut für Festkörperphysik, Sekr. PN 6-1, Hardenbergstrasse 36, D-10623 Berlin, Germany
  • 3ISAS-Institute for Analytical Sciences, Department Berlin, Albert-Einstein Strasse 9, 12489 Berlin, Germany
  • 4INFM, Universitá di Roma Tor Vergata, Via della Ricerca Scientifica 1, I-00133 Roma, Italy

  • *Electronic address: fleisck@tcd.ie

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Issue

Vol. 74, Iss. 19 — 15 November 2006

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