【摘要】 实验观察到了激光束通过KIO₃单晶时产生的偏振态改变90°的衍射带和衍射斑。研究了从室温到240℃温度范围内衍射光强随晶体温度的变化,当T=72℃ 时衍射光强突然急剧增加,T=212℃时衍射光强几乎减小到零,T>212℃时观察不到衍射光,72℃和212℃分别与有关文献报道的KIO₃的两个相变温度相同。更多还原

【Abstract】 In this paper, the diffraction bands and spots experimentally observed when a laser beam passed through a KIO3 single crystal are reported. The bands and spots are formed by the diffracted beam, the plane of polarization of which rotates 90?with respect to that of the incident beam. The temperature dependence of the diffracted light was investigated in the region from room temperature to 240℃. It was found that when T=72℃the intensity increased abrupty, when T=212℃it decreased ;altnost to zero, and when T>212℃ no diffracted light was observed. The two temperatures, 72℃ and 212℃, determined from the anomaly of the intensity dependence, are iu agreement very well with the phase transition temperatures of KIO3 crystals reported in the literature.更多还原