Reversal of the dipole vortex in a negative index of refraction material

被引：2
|
作者：
Li, Xin [1 ]
Arnoldus, Henk F. [1 ]
机构：
[1] Mississippi State Univ, Dept Phys & Astron, Mississippi State, MS 39762 USA
来源：
PHYSICS LETTERS A | 2010年 / 374卷 / 43期
关键词：
Negative index of refraction; Metamaterial; Optical vortex; Dipole radiation; LOW-FREQUENCY PLASMONS; OPTICAL METAMATERIALS;
D O I：
10.1016/j.physleta.2010.09.012
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
When a small particle is illuminated by a circularly polarized laser beam, the induced electric dipole moment rotates in a plane. The flow lines of the emitted electromagnetic energy are the field lines of the Poynting vector. When the particle is embedded in a dielectric, these field lines have a vortex structure, and the rotation in the vortex has the same orientation as the rotation direction of the dipole. We show that when the embedding medium is a negative index of refraction material, the direction of rotation in the vortex is reversed. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：4479 / 4482
页数：4
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