Optical trapping of nonspherical particles in the T-matrix formalism.
Optical trapping of nonspherical particles in the T-matrix formalism.
复制标题
T 矩阵形式中非球形粒子的光捕获。
DOI：
10.1615/ichmt.2007.confelectromagligscat.60
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发表时间：
2007
期刊：
影响因子：
3.8
通讯作者：
M. Iatì
中科院分区：
文献类型：
--
作者：
F. Borghese;P. Denti;R. Saija;M. Iatì
本文在转移矩阵方法的框架下，建立了非球形粒子在高数值孔径光学系统聚焦区的捕获理论。考虑了无像差透镜和有像差透镜的情况。该理论适用于各种尺寸的单个乳胶球，当结果与现有的实验数据进行比较时，达到了公平的协议。该理论也适用于二元团簇的乳胶球的直径为220 nm的各种取向。虽然，在这种情况下，我们没有实验数据，我们的结果可以比较，我们得到了有用的迹象，非球形粒子的捕获。特别是，我们发现与最近的结果基本一致的捕获长椭球体在像差高斯场[S。H. Simpson和S. Hanna，J. Opt. Soc. Am. A 24，430（2007）]。
The theory of the trapping of nonspherical particles in the focal region of a high-numerical-aperture optical system is formulated in the framework of the transition matrix approach. Both the case of an unaberrated lens and the case of an aberrated one are considered. The theory is applied to single latex spheres of various sizes and, when the results are compared with the available experimental data, a fair agreement is attained. The theory is also applied to binary clusters of spheres of latex with a diameter of 220nm in various orientations. Although, in this case we have no experimental data to which our results can be compared, we get useful indications for the trapping of nonspherical particles. In particular, we find substantial agreement with recent results on the trapping of prolate spheroids in aberrated gaussian fields [S. H. Simpson and S. Hanna, J. Opt.Soc. Am. A 24, 430 (2007)].