Table of Contents
Physics Research International
Volume 2012, Article ID 969835, 11 pages
http://dx.doi.org/10.1155/2012/969835
Review Article

Control of Cross-Sections and Optical Nonlinearity of Pt Nanowires and the Roughness Effect

School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi 923-1292, Japan

Received 2 December 2011; Accepted 9 January 2012

Academic Editor: Vladimir I. Gavrilenko

Copyright © 2012 Y. Ogata and G. Mizutani. 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

In this paper we review our fabrication of Pt nanowire arrays on MgO(110) faceted templates by a shadow deposition method and our control of their cross-sectional shapes by adjusting the deposition directions of platinum. We obtained nanowire arrays with and macroscopic symmetries. These macroscopic symmetries influence optical second harmonic generation (SHG) susceptibility elements of the nanowire arrays sensitively. On the other hand, the roughness of the nanowires had an effect on the rotational SHG patterns as a function of the sample rotation angle around the surface normal. We tried to explain the pattern change by a second-order perturbation scheme with respect to the roughness amplitude.