Axial and lateral trapping efficiency of Laguerre-Gaussian modes in inverted optical tweezers

被引：105
作者：
O'Neil, AT
Padgett, MJ
机构：
[1] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland
[2] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland
来源：
OPTICS COMMUNICATIONS | 2001年 / 193卷 / 1-6期
关键词：
optical tweezers; optical trapping; Laguerre-Gaussian laser modes; vortices;
D O I：
10.1016/S0030-4018(01)01198-1
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Within inverted optical tweezers we measure both the lateral and axial trapping efficiency obtained with Gaussian and high-order Laguerre-Gaussian beams. Our results confirm that, for larger particles, the axial trapping is improved by using a Laguerre-Gaussian beam but, contrary to earlier suggestions, that the lateral efficiency is unchanged. We show that this latter observation is compatible with a ray-optical model of the trapping mechanism. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：45 / 50
页数：6
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