Optical properties of a silver layer in zno/ag/zno and tio2/ag/tio2 systems

Abraham Belkind, Valery A. Koss, Kazem Memarzadeh, John A. Woollam

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Effective dielectric constants of the silver layers in three ZnO/Ag/ZnO and two TiO2/Ag/TiO2 coatings are determined using spectroscopic ellipsometry assuming a three-layer model for the coatings. Drude analysis of the data shows that (i) the effective dielectric constants of silver in the red and near infrared regions are close to that of bulk silver, and (ii) both, bulk plasmon energy and core polarizability, depend on the layer thickness. Three peaks, at 3.8-3.9, 3.5-3.7 and 2.9-3.3 eV, are observed in the spectra of the imaginary part of the effective dielectric constant. Generation of surface plasmons, indicated by these peaks, is considered as a consequence of surface roughness which is not included in the original three-layer model. Analysis of data on transmittance and reflectance, measured at incidence angles of 45° and 60, confirms surface plasmon generation.

Original languageEnglish (US)
Pages (from-to)207-216
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume1016
DOIs
StatePublished - Mar 6 1989

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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