Abstract
Isothermal decay of poling induced optical nonlinearity of guest-host polymer thin films was measured by the technique of in situ optical second-harmonic generation. The effect of physical aging on the decay rate was studied over a series of aging temperatures. It was found that aging effects were localized in temperature, and diminished with increasing difference between the aging and decay temperatures. The temperature localization of the aging effects can be understood in terms of the dispersive nature of the relaxation lifetimes of polymers.
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