Electronic and centre of mass transitions driven by Laguerre-Gaussian beams

被引：14
|
作者：
Alexandrescu, A [1 ]
Di Fabrizio, E
Cojoc, D
机构：
[1] Univ Bucharest, CCO, Optoelect Res Ctr, RO-61071 Bucharest, Romania
[2] Univ Bucharest, Dept Technol & Reliabil, RO-61071 Bucharest, Romania
[3] Elettra Sincrotrone, INFM, TASC, IT-34012 Trieste, Italy
[4] Univ Magna Graecia, I-88100 Catanzaro, Italy
来源：
JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS | 2005年 / 7卷 / 04期
关键词：
orbital angular momentum; regular solid spherical harmonics; centre of mass motion; selection rules; dipole and quadrupole interaction;
D O I：
10.1088/1464-4266/7/4/001
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We derive the interaction Hamiltonian of a Laguerre-Gaussian beam with a simple atomic system, under the assumption of a small spread of the centre of mass wavefunction in comparison with the waist of the Laguerre-Gaussian beam and taking into account the centre of mass motion of the atomic system. Using the properties of regular spherical harmonics the internal and centre of mass dynamical variables are separated without making any multipolar expansion. The features of angular momentum exchange process assisted by Laguerre-Gaussian beams and the influence of their winding number on the selection rules and transition probability of internal and centre of mass motion are discussed.
引用
收藏
页码：87 / 92
页数：6
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