The production of spin-polarized electrons and the modulation of polarization direction with liquid crystal variable retarder (LCVR) are discussed.
LCVR控制入射光子的偏振度，从而实现对自旋极化电子束极化方向的调制。
2
The challenge, however, is extracting the spins to form a spin-polarized current and injecting them into a circuit without the polarization degrading along the way.
唯一的挑战是，如何提取自旋来形成一个自旋极化的电流，然后注入到电路中并保持极化在沿途不发生退化。
3
Moreover, electron-spin polarization are relevant to the structure parameters of the system, so we can control spin-polarized electronic behavior by means of adjusting ferromagnetic stripes.