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

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...

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Published inJournal of Optoelectronics and Advanced Materials Vol. 9; no. 7; pp. 2097 - 2101
Main Authors Mohajerani, E, Fakhri, M, Hajebifard, A
Format Journal Article
LanguageEnglish
Published 01.07.2007
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Summary: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.
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ISSN:1454-4164