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Double mechanism of electric field induced reorientation of dipoles in MNA/PMMA guest-host system

E. MOHAJERANI1,* , M. FAKHRI1, A. HAJEBIFARD1

Affiliation

  1. Laser Research Institute, Shahid Beheshti University, Evin, Tehran, Iran

Abstract

The time, temperature and frequency dependent birefringence of MNA doped PMMA film in waveguide structure are investigated using ellipsometry. The relaxation of dye molecules in the polymer matrix is studied. It is shown that for a small molecule like MNA, by increasing the frequency of the applied voltage a single KWW function is not sufficient to describe the change in the signal, which is a measure of the relaxation dynamics, and we need two stretched exponential functions to fully describe the process..

Keywords

Orientational dynamics, Dye doped polymers, Electro-optic modulation, Electric field poling.

Submitted at: March 7, 2007
Accepted at: July 15, 2007

Citation

E. MOHAJERANI, M. FAKHRI, A. HAJEBIFARD, Double mechanism of electric field induced reorientation of dipoles in MNA/PMMA guest-host system, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 7, pp. 2097-2101 (2007)