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Advances in Condensed Matter Physics
Volume 2014, Article ID 857680, 10 pages
http://dx.doi.org/10.1155/2014/857680
Research Article

Nanostructure and Optical Properties of Silver Helical Pentagon Nanosculptured Thin Films

Department of Physics, University of Tehran, North Kargar Street, Tehran, Iran

Received 20 May 2013; Revised 12 October 2013; Accepted 31 October 2013; Published 20 January 2014

Academic Editor: Michael C. Tringides

Copyright © 2014 Hadi Savaloni et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Silver helical pentagon shaped nanosculptured thin films (HPNSTFs) were produced using oblique angle deposition method in conjunction with the rotation of sample holder under controlled conditions. The -polarization extinction spectra obtained at different azimuthal angles ( ) and low incidence angle (i.e., ) from the Ag (HPNSTF) did not show significant change in the plasmon peak position, while at higher incidence angle (i.e., ) a blue shift appeared for the broad peak which was observed for lower incidence angle (i.e., ) and occurred at lower wavelength. In case of -polarized light a very broad peak was obtained for the incidence angle and for different angles and when compared with the lower incidence angle results it can be concluded that it is gone under a red shift. Polar diagrams of the samples showed slight anisotropy that should be due to high symmetry of the pentagon helical structure.