Reinvestigation of electric field-induced optical activity in α-quartz: application of a polarimeter with four photoelastic modulators.
Reinvestigation of electric field-induced optical activity in α-quartz: application of a polarimeter with four photoelastic modulators.
复制标题
重新研究 α-石英中电场引起的光学活性：具有四个光弹性调制器的旋光计的应用。
作者：
A. Gupta;O. Arteaga;Ryan C. Haislmaier;B. Kahr;V. Gopalan
用一个完整的Mueller矩阵偏振计测量了x切和z切右旋α-石英的线性电旋（电场诱导旋光性）和电光效应。分析中使用的旋光仪配备有四个在不同频率下工作的光弹性调制器。由于调制器的保真度以及所有Mueller矩阵元件可以在没有任何移动光学元件的情况下被递送的事实，该配置是特别敏感的。重新测量了线性电回转系数γ11与入射光波长的关系。将对称性要求为零的系数γ33作为对照进行评价。γ11远小于先前使用依赖于机械光调制的装置获得的值。电旋转测量经常被更大的线性电光效应所混淆。这里使用的Mueller演算非常适合于分离光的偏振态的竞争变化。与元素β（11）和β（33）相关的二次电旋转未检测到。
Linear electrogyration (electric field-induced optical activity) and electro-optic effects in x-cut and z-cut right-handed (RH) α-quartz were measured using a complete Mueller matrix polarimeter. The polarimeter used in the analysis was equipped with four photoelastic modulators operating at different frequencies. This configuration is especially sensitive due to the fidelity of the modulators and the fact that all the Mueller matrix elements can be delivered without any moving optical elements. The linear electrogyration coefficient γ11 as a function of the wavelength of incident light was remeasured. The coefficient γ33 , required by symmetry to be zero, was evaluated as a control. γ11 was much smaller than values obtained previously using devices dependent on mechanical light modulation. Electrogyration measurements have often been confounded by the much larger linear electro-optic effect. The Mueller calculus used herein is well suited to the separation of the competing changes to the polarization state of light. Quadratic electrogyration associated with elements β(11) and β(33) was not detectable.