Issue Eur. Phys. J. Appl. Phys. Volume 37, Number 1, January 2007 Page(s) 61 - 64 Section Laser and Optics DOI 10.1051/epjap:2006129 Published online 15 November 2006

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

Spectroscopic ellipsometry investigation of azo dye and azo dye doped polymer

O. Taqatqa¹ and H. Al Attar<sup>2

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

O.taqatqa@ju.edu.jo

(Received: 12 April 2006 / Received in final form: 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.

PACS
42.70.Jk - Polymers and organics.
42.70.-a - Optical materials.
07.57.Ty - Infrared spectrometers, auxiliary equipment, and techniques.

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