THz dielectric anisotropy of metal slanted columnar thin films

T. Hofmann, D. Schmidt, A. Boosalis, P. Khne, R. Skomski, C. M. Herzinger, J. A. Woollam, M. Schubert, E. Schubert

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


The anisotropic optical dielectric functions of a metal (cobalt) slanted columnar thin film deposited by electron-beam glancing angle deposition are reported for the terahertz (THz) frequency domain using generalized spectroscopic ellipsometry. We employ a simple effective medium dielectric function homogenization approach to describe the observed optical response. The approach describes isolated, electrically conductive columns which render the thin film biaxial (orthorhombic). Our findings suggest controlled variability of dielectric polarizability and anisotropy in the THz spectral range by choice of geometry, material, and structure.

Original languageEnglish (US)
Article number081903
JournalApplied Physics Letters
Issue number8
StatePublished - Aug 22 2011

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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