Light's orbital angular momentum

被引：586

作者：

Padgett, M ^{[1
]}

Courtial, J ^{[1
]}

Allen, L ^{[1
]}

机构：

[1] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland

来源：

PHYSICS TODAY | 2004年 / 57卷 / 05期

关键词：

D O I：

10.1063/1.1768672

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The orbital angular momentum of the light beams is discussed. Analytic treatment of the electromagnetic field gives the total angular momentum of any light field in terms of a sum of spin and orbital contribution. The Poynting vector, which gives the direction and magnitude of the momentum flow, is the vector product of the electric and magnetic field intensities. The results show that if the signal beam carries orbital angular momentum, its phase transformation and angular momentum is transfered first to the atoms and then after a deexcitation time, to the reflected beam.

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页码：35 / 40

页数：6

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