Laser beam drive of micro motor

本研究的目的是利用激光束产生的辐射压力作为驱动力，实现微米量级的微马达。电机（直线、旋转或悬浮）由激光束驱动，不使用机械或电气手段。在研究中，进行了微粒子驱动实验。对辐射压力驱动力进行了理论分析，并进行了三维激光操纵粒子的实验研究。该粒子对应于微电机中的运动部件。测量了颗粒的材料、尺寸、形状和质量的影响。提出了基于倏逝场的驱动方法。研究表明，利用倏逝场驱动是一种很有前途的方法。通过实验确定了这种驱动的最佳条件，并利用物理模型从理论上分析了倏逝场产生的驱动力。通过数值模拟结果与实验结果的对比，验证了模型的有效性。通过仿真结果，推导出了有效获得最大驱动力的最佳条件，并考虑了利用激光捕获技术组装微电机的可行性。

The objective of this research is to realize the miro-motor whose size is in the order of micron, by using radiation-pressure generated by laser beam as the driving force. The motor (linear, rotational, or levitational) is driven by laser beam, without using mechanical or electrical means. In the research, the experiments on the driving of mirco particles was conducted. The driving force by the radiation pressure was also theoretically analyzed.The experiment of three-dimensional laser-beam manipulation of the particle was carried out. This particle correspondes to the moving part in the micro-motor. Effects of the material, size, shape and mass of the particle were measured. The driving method with evanescent field was proposed. It was found out that the driving using evanescent field was promising way. Optimal conditions for this driving were evaluated experimentally.The driving force made from evanescent field was examined theoretically by using a physical model. By comparing the results of the numerical simulations with the experimental results, validness of the model was examined. Through the simulation results, the optimal condition to effectively obtain the maximum driving force was derived.Utilizing laser trapping techniques to assemble micro-motor was also considered, and the feasibility was investigated experimentally.