Eur. Phys. J. Appl. Phys. 37, 61-64 (2007)
https://doi.org/10.1051/epjap:2006129

Spectroscopic ellipsometry investigation of azo dye and azo dye doped polymer

¹ Department of Physics, University of Jordan, 11942 Amman, Jordan
² Department of Physics, University of Durham, OEM Group, DH1 3LE, UK

Corresponding author: O.taqatqa@ju.edu.jo

Received: 12 April 2006
Revised: 8 August 2006
Accepted: 11 September 2006
Published online: 15 November 2006

Abstract

The optical constants of azo dye (Methyl Red (MR)) and azo dye doped polymer (ADP) (Polymethylmethacrylate (PMMA)) MR/PMMA have been investigated using Variable Angle Spectroscopic Ellipsometry (VASE). Pure MR was modeled using Lorentz formula with three oscillators. A Bruggmann effective medium approximation layer was employed with three constituents (MR, PMMA and void) to represent the thin film of MR/PMMA. The optical constants of MR/PMMA were determined at various MR concentrations. The results reveal that the optical constants of the blend system are a linear interpolation of the two constituents. Average optical constants were determined using multiple sample analysis.