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

被引：1504

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.

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页码：826 / 829

页数：4

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