Abnormal Phenomena of Optical Rotation in Electrooptic Crystal

电光晶体旋光异常现象

• 批准号: 63550041
• 负责人: MINEMOTO Takumi
• 金额: $ 1.09万
• 依托单位: Faculty of Engineering, Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63550041/
• 关键词: Optical rotation; Electrooptic effect; Double refraction; Spatial light modulator; Optical Modulator; Single crystal; Optical activity; Optical rotation; Electrooptic effect; Double refraction; Spatial light modulator; Optical Modulator; Single crystal; Optical activity

The longitudinal and the transverse electrooptic effects combining with the optical rotation in electrooptic single crystals of Bi_<12>SiO_<20> have been measured precisely and analyzed by using the results of theoretical crystal optics, under the conditions when the crystals were illuminated and were not illuminated by blue light. The following new results have been obtained:(1) The dependence of the optical activity of Bi_<12>SiO_<20> single crystal on the electric field strength in the crystal has been detected and the first order electrogyration coefficient mu 41 has been determined. (2) The photoactivity, the phenomenon that the optical activity of the crystal is affected by illumination of light and had been reported in Bi_<12>SiO_<20> and Bi_<12>GeO_<20> crystals by P. V. Lenzo et al., has not been recognized, but the rotation of the polarized axis of transmitted light from the crystal plate has been affected by the illumination of blue light on the crystal. From precise measurements and analysis, it has been known that the effect is caused by the change of electric field due to the drift and the diffusion of photocarriers in the crystal.Same phenomena as those described above have been observed also in the Bi_<12>GeO_<20> crystal. But in KD_2PO_4 crystal the optical rotation has not been observed and the optical activity does not depend on the electric field strength.

在BI__ <12> SIO_ <20>的电型单晶中，纵向和横向电效效应已精确测量并通过使用理论晶体光学器件的结果进行测量，并在晶体被照亮并未被蓝光照射的条件下进行分析。已经获得了以下新结果：（1）已经检测到BI__ <12> SIO_ <20>单晶对晶体中电场强度的光活性的依赖性，并且已经确定了一阶电元系数MU 41。 （2）光效率，即晶体的光学活性受光的影响的现象，在Bi__ <12> SiO_ <20>和BI_ <12> Geo_ <20>晶体中得到了P. V. Lenzo等人的晶体的报道，但尚未认识到，尚未认识到透射式晶体的旋转式的旋转灯光的旋转。从精确的测量和分析中，已经知道该作用是由于在晶体中的漂移和光载体的扩散引起的。但是在KD_2PO_4中，尚未观察到光学旋转，并且光学活性不取决于电场强度。