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ExperimentIntroduction液晶的正單光軸晶體光學雙折射性Dielectricanisotropyoftheliquidcrystals5CB液晶折射率隨溫度的變化5CB液晶方位秩序隨溫度的變化Dye-InducedTorqueinDye-DopedNematicsJanossymodel(“Positive”torque)Gibbonsmodel(“Negative”torque)PhotoisomerizationEffectInducedLCReorientationI1=I2=I0ExperimentalsetupResultsanddiscussion(Pump,Probe)nonavConclusionsofExperimentⅠ-1ExperimentII:Theenhancementofdiffractioninliquidcrystalsondye-dopedpolymerfilmsDR1-PMMA薄膜在不同的pulseenergy作用下之一階繞射效率27℃DDPF及DDPF/5CB薄膜的SRGConclusionsofExperimentII: