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为优化双折射晶体微粒的旋转频率,基于光致旋转技术对晶体微粒在偏振光自旋角动量作用下的转动进行了理论分析,通过给定参数模拟了石英(SiO2)晶体微粒旋转频率与其厚度和激光有效功率的变化关系曲线。依此优化了光致旋转的实验装置,并在此装置上对不同厚度的石英晶体微粒的旋转频率进行了测量。结果表明,微粒的旋转频率与微粒厚度呈现周期性曲线变化关系,并且旋转频率与有效激光功率成正比,实验测得石英晶体微粒的最高旋转频率为9.2Hz,与理论模拟结果基本吻合。该结论为光驱动微机械马达实现技术的进一步深入研究提供了基础理论和技术保障。
In order to optimize the rotation frequency of birefringent crystal particles, the rotation of crystal particles under the angular rotation of polarized light is theoretically analyzed based on the photo-rotation technique. The relationship between the rotation frequency of quartz crystal (SiO2) particles and the thickness And the laser effective power curve. In this way, the experimental device of photo-rotation is optimized, and the rotation frequency of quartz crystal particles of different thickness is measured on this device. The results show that the rotation frequency of the particles and the thickness of the particles show a periodic curve, and the rotation frequency is proportional to the effective laser power. The maximum rotation frequency of the quartz crystal particles measured by the experiment is 9.2 Hz, which is in good agreement with the theoretical simulation results. This conclusion provides the basic theory and technical support for the further research on the technology of optical drive micromechanical motor.