Zhao Yiqiong, Milne Graham, Edgar J Scott, Jeffries Gavin D M, McGloin David, Chiu Daniel T
Appl Phys Lett. 2008 Apr 21;92(16):161111-1611113. doi: 10.1063/1.2912031. Epub 2008 Apr 24.
This paper describes the quantitative force mapping of micron-sized particles held in an optical vortex trap. We present a simple and efficient model, which accounts for the diffraction of the strongly localized optical field of the tightly focused laser beam, the spherical aberration introduced by the dielectric glass-to-water interface, employs the multidipole approximation for force calculations, and is able to reproduce, with quantitative agreement, the experimentally measured force map.
本文描述了在光学涡旋阱中捕获的微米级粒子的定量力映射。我们提出了一个简单而有效的模型，该模型考虑了紧聚焦激光束的强局域光场的衍射、介电玻璃与水界面引入的球差，在力的计算中采用多极近似，并且能够与实验测量的力映射定量一致地再现。
