当去除1/4波片2和3时，则能够测量电子电荷的双极扩散常数和迁移率。
When 1/4 wave plate 2 and 3 are removed, the ambipolar diffusion constant and mobility of electron charge can be measured.
实验装置原理图如摘要附图1所示，可以测量电子自旋的双极扩散常数；
The experiment device schematic diagram is shown in the drawing 1 of the abstract and can be used to measure the ambipolar diffusion constant of electron spin;
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