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Abstract
The dynamic behavior of surface relief grating of dye-doped polymer film has been under investigation. The enhancement of the first-order diffraction efficiency for dye-doped polymer film can be demonstrated through the use of nematic liquid crystals as the interface. The larger surface modulation of relief grating measured by the atomic force microscopy is consistent with the enhancement of the first-order diffraction efficiency. The time evolution of diffraction efficiency for dye-doped polymer film in contact with nematic liquid crystals shows the pattern of rise-decay-rise to a stable level. The decay of diffraction efficiency is temperature dependent. The pump-probe transmission experiment confirms that the decay of diffraction efficiency is attributed to the inhomogeneous orientation of nematic liquid crystals due to photothermal fluctuation.
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