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研究激光波长对纳米光纤俘获和输送聚苯乙烯微球能力的影响.理论分析结果表明,当光纤直径和激光功率一定时,随着激光波长的增大,光纤外面倏逝波的分布范围和强度都变大,微球所受到的光梯度力和散射力也随之增大,这意味着纳米光纤俘获和输送微球的能力随着激光波长的增大而增强.实验现象和理论预测完全符合.将三种波长的激光分别导入直径为600 nm的光纤中,通过实验观察发现,随着激光波长的增大,俘获微球所需要的临界功率变小,意味着光纤俘获微球的能力增强;而当激光功率一定时,随着激光波长的增大,微球的运动速度也增大,说明光纤输送微球的能力增强.
The effect of laser wavelength on the ability of nano-fiber to capture and transport polystyrene microspheres was studied.The theoretical analysis shows that with the increase of laser wavelength, the distribution range and intensity of the evanescent wave The larger the gradient and scattering power of the microspheres are, which means that the ability of the nanofiber to capture and transport the microspheres increases with the increase of the laser wavelength.The experimental results are in good agreement with the theoretical prediction. The three kinds of laser beams are respectively introduced into 600 nm diameter optical fiber. The experimental results show that the critical power required to capture the microspheres decreases with the increase of the laser wavelength, which means the ability of the optical fiber to capture the microspheres is enhanced. When the laser power is constant, with the increase of the laser wavelength, the moving speed of the microspheres also increases, indicating that the ability of the optical fiber to transport the microspheres is enhanced.