Optical anisotropy of porous polymer film with inverse slanted nanocolumnar structure revealed via generalized spectroscopic ellipsometry

Authors

Dan Liang, University of Nebraska-LincolnFollow
Derek Sekora, University of Nebraska-LincolnFollow
Charles Rice, University of Nebraska-LincolnFollow
Eva Schubert, University of Nebraska-LincolnFollow
Mathias Schubert, University of Nebraska-LincolnFollow

Date of this Version

8-2015

Citation

APPLIED PHYSICS LETTERS 107, 071908 (2015)

doi: 10.1063/1.4929367

Comments

Copyright (c) 2015 AIP Publishing LLC. Used by permission.

Abstract

We use generalized spectroscopic ellipsometry to characterize the biaxial optical properties of porous polymer and slanted nanocolumnar template thin films. The porous polymer with inverse columnar structure was prepared via infiltrating polymer into the voids of the slanted nanocolumnar film and selectively removing the column material (cobalt). The anisotropic Bruggeman effective medium approximation was employed to analyze the ellipsometry data of the porous polymer film and nanocolumnar template. The classification and structure of optical anisotropy are found to be identical for both samples. The interchangeable optical behaviors between two complementary structures are attributed to the equivalency in their anisotropic polarizabilities.