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

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.

本文<12><20>用理论晶体光学的结果，对Bi_SiO_2电光单晶在蓝光照射和非蓝光照射条件下的纵向、横向电光效应和旋光效应进行了精确的测量和分析。（1）测定了Bi_<12>SiO_2<20>单晶的旋光性与晶体内电场强度的关系，并确定了一级电回转系数μ 41。(2)光活性，晶体的光学活性受光照射影响的现象，P.V.Lenzo等人在Bi_ SiO<12>_2<20>和Bi_<12>GeO_2<20>晶体中已经报道，还没有认识到，但从晶体板透射的光的偏振轴的旋转已经受到蓝光照射在晶体上的影响。通过精确的测量和分析，我们知道这种效应是由于晶体中光生载流子的漂移和扩散引起的电场变化引起的，在Bi_ GeO_2晶体中也观察到了同样的现象<12><20>。但在KD_2PO_4晶体中没有观察到旋光性，旋光性不依赖于电场强度。

项目成果

Jing Chen and Takumi Minemoto: "A spatial light modulator using a Bi_<12>SiO_<20> crystal and an electrooptic insulator." Optics Communications. 20. 29-34 (1989)

Jing Chen 和 Takumi Minemoto：“使用 Bi_<12>SiO_<20> 晶体和电光绝缘体的空间光调制器。”

Jing CHEN;Takumi MINEMOTO: Applied Optics.

陈静；峰本拓美：应用光学。

Kiyoshi Nakagawa and Takumi Minemoto: "Measurement of the displacement distribution by speckle photography using BSO crystal" Optics Communications, 1990.

Kiyoshi Nakakawa 和 Takumi Minemoto：“使用 BSO 晶体通过散斑摄影测量位移分布”光学通讯，1990 年。

Kiyoshi Nakagawa,Toshiyuki Takatsuji and Takumi Minemoto: "Measurement of the displacement distribution by speckle photography using BSO crystal" Optics Communications.(1990)

Kiyoshi Nakakawa、Toshiyuki Takatsuji 和 Takumi Minemoto：“使用 BSO 晶体通过散斑摄影测量位移分布”Optics Communications。（1990 年）

Jing Chen and Takumi Minemoto: "A spatial light modulator using a Bi_<12>SiO_<20> crystal and an electrooptic insulator" Optics Communications.20-1. 29-34 (1989)

Jing Chen 和 Takumi Minemoto：“使用 Bi_<12>SiO_<20> 晶体和电光绝缘体的空间光调制器”Optics Communications.20-1。