Selection rules for atomic excitation by twisted light

被引：8

作者：

Duan, Yuxiong ^{[1
,2
]}

Mueller, Robert A. ^{[1
,2
]}

Surzhykov, Andrey ^{[1
,2
]}

机构：

[1] Phys Tech Bundesanstalt, D-38116 Braunschweig, Germany

[2] Tech Univ Carolo Wilhelmina Braunschweig, D-38106 Braunschweig, Germany

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2019年 / 52卷 / 18期

关键词：

twisted light; atomic excitation; selection rules; ORBITAL ANGULAR-MOMENTUM; VORTEX; GENERATION;

D O I：

10.1088/1361-6455/ab3631

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A theoretical analysis of the selection rules for atomic excitation by twisted light is presented. To perform the analysis, we expand the vector potential of twisted light in terms of its multipole components. We find that its multipole composition locally depends on the radial position in the wavefront, and this position dependence is imprinted in the selection rules. Detailed calculations are performed for Bessel beams and the 4s S-2(1/2) -> 3d D-2(5/2) transition of a Ca+ ion. Our results indicate that the parameters of the twisted beams can be efficiently used to select the total angular momentum and its projection that can be transferred to an atom in the excitation process.

引用

页数：8

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