Transfer of orbital angular momentum to metal particles confined using optical tweezers

被引：1
|
作者：
O'Neil, AT [1 ]
Padgett, MJ [1 ]
机构：
[1] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland
来源：
LASER APPLICATIONS IN MICROELECTRONIC AND OPTOELECTRONIC MANUFACTURING VI | 2001年 / 4274卷
关键词：
orbital angular momentum; optical tweezers; Laguerre-Gaussian modes;
D O I：
10.1117/12.432508
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Using Laguerre-Gaussian beams in an inverted optical tweezers geometry we observe that silver particles, 2 mum in diameter, are confined to an annulus around the outside of the beam. This annulus is situated 4 mum below the beam waist where the upward scattering force counterbalances gravity. The scattering force results in a transfer of the orbital angular momentum content of the beam to the particle causing it to rotate about the beam axis.
引用
收藏
页码：177 / 182
页数：4
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