Sharper focus for a radially polarized light beam

被引：1859

作者：

Dorn, R ^{[1
]}

Quabis, S ^{[1
]}

Leuchs, G ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Max Planck Inst Grp Opt Informat & Photon, D-91058 Erlangen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.91.233901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We experimentally demonstrate for the first time that a radially polarized field can be focused to a spot size significantly smaller [0.16(1)lambda(2)] than for linear polarization (0.26lambda(2)). The effect of the vector properties of light is shown by a comparison of the focal intensity distribution for radially and azimuthally polarized input fields. For strong focusing, a radially polarized field leads to a longitudinal electric field component at the focus which is sharp and centered at the optical axis. The relative contribution of this component is enhanced by using an annular aperture.

引用

页数：4

共 28 条

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