Interactions between spherical nanoparticles optically trapped in Laguerre-Gaussian modes

被引：50

作者：

Bradshaw, DS ^{[1
]}

Andrews, DL ^{[1
]}

机构：

[1] Univ E Anglia, Sch Chem Sci, Norwich NR4 7TJ, Norfolk, England

来源：

OPTICS LETTERS | 2005年 / 30卷 / 22期

关键词：

D O I：

10.1364/OL.30.003039

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

When a Laguerre-Gaussian (LG) laser mode is used to trap nanoparticles, the spatial disposition of the particles about the beam axis is determined by a secondary mechanism that engages the input radiation with the interparticle potential. This analysis, based on the identification of a range-dependent laser-induced energy shift, elicits and details features that arise for spherical nanoparticles irradiated by a LG mode. Calculations of the absolute minima are performed for LG beams (c) of variable topological charge, and the results are displayed graphically. It is shown that more complex ordered structures emerge on extension to three and four-particle systems and that similar principles will apply to other kinds of radially structured optical mode. 2005 Optical Society of America

引用

页码：3039 / 3041

页数：3

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