Abstract
The model of the rotational diffusion of the azo-dye molecules under the action of polarized uv light was used to explain the formation of the photoinduced order in azo-dye layers. We consider both the approximations of negligible and strong molecular interaction during the process of the reorientation under the field of a polarized light. We constructed an experimental setup, based on a photoelastic modulator, that allows accurate in situ measurements of the phase retardation of thin film as a function of the exposure time and exposure power . A good agreement with experiment was observed. Fitting the experimental curves for different power values , we can estimate the coefficient of rotational diffusion , azo-dye order parameter , and other parameters of the rotational diffusion model.
4 More- Received 13 January 2004
DOI:https://doi.org/10.1103/PhysRevE.69.061713
©2004 American Physical Society