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文献[1]发现激光束通过c向直流电压作用下的α-LiIO3单晶时,产生一种电矢量有特定取向且不同于入射光电矢量方向的异常散射带。本文进一步研究了这种散射带的精细结构。确定散射光相对于入射光没有大于15MHz的频移。这种散射带的强度在透射光斑两侧分布不对称,一侧强,另一侧弱。我们发现两种绝对构型的晶体,散射带的强度分布正相反,D型晶体散射强的一侧,正是L型晶体散射弱的一侧。并研究了异常散射带位置和透射光斑的位置间的各种配置状况,发现它们取决于两个通光面相对于c轴的取向。It is found in Eef. [1] that a band of scattered light is produced when a laser beam passes through an α-LiIO3 single crystal under the action of a DC field along the c-axis. The electric vector of the scattered light has special direction which differs from that of the incident beam. In this paper, we have further investigated the characters of this scattering of light. The fine structure of the band has been studied. No frequency shift between the scattered and incident beam larger than 15 MHz has been. observed. The distribution of intensity of the band is asymmetric with respect to the transmitted light spot, one side is stronger than another. We have found that the distributions of intensity of the scattering band are inverse for the two types of absolute configuration of α-LiIO3 single crystals, that is the stronger side of the band for the D type crystal corresponds to the weaker side for the L type crystal. We have also studied the relationship between locations of bands and that of the transmitted light spots, and found it is dependent on the orientations, of the incident and exit surfaces of specimens with respect to the c-axis of the crystal.
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