DIRECT OBSERVATION OF TRANSFER OF ANGULAR-MOMENTUM TO ABSORPTIVE PARTICLES FROM A LASER-BEAM WITH A PHASE SINGULARITY

被引：1463
|
作者：
HE, H
FRIESE, MEJ
HECKENBERG, NR
RUBINSZTEINDUNLOP, H
机构：
[1] Department of Physics, University of Queensland, Brisbane
来源：
PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 05期
关键词：
D O I：
10.1103/PhysRevLett.75.826
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Black or reflective particles can be trapped in the dark central minimum of a doughnut laser beam produced using a high efficiency computer generated hologram. Such beams carry angular momentum due to the helical wave-front structure associated with the central phase singularity even when linearly polarized. Trapped absorptive particles spin due to absorption of this angular momentum transferred from the singularity beam. The direction of spin can be reversed by changing the sign of the singularity.
引用
收藏
页码：826 / 829
页数：4
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