Abstract
The reorientational dynamics of chromophores in a photorefractive polymer composite are characterized by use of a new, analytical, nonexponential expression. A single material parameter, the diffusion constant, is used to describe reorientation in the material. The effect of plasticization on the diffusion constant is studied. The relationship between space-charge field growth and the biexponential fit to holographic growth is investigated. For typical parameters the exponential space-charge field’s rise time may be as much as 10 times less than the holographic growth time constant obtained conventionally.
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