The focus of light -: theoretical calculation and experimental tomographic reconstruction

被引：202

作者：

Quabis, S ^{[1
]}

Dorn, R ^{[1
]}

Eberler, M ^{[1
]}

Glöckl, O ^{[1
]}

Leuchs, G ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Chair Opt, Dept Phys, D-91058 Erlangen, Germany

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2001年 / 72卷 / 01期

关键词：

PACS: 42.15.Dp; 42.25.Ja; 42.30.Wb;

D O I：

10.1007/s003400000451

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present numerical calculations on the field distribution in the focus of an optical system with high numerical aperture. The diffraction integrals which are based on the Debye approximation are derived and evaluated for a radially polarized input field with a doughnut-shaped intensity distribution. It is shown that this mode focusses down to a spot size significantly smaller as compared to the case of linear polarization. An experimental setup to measure the three-dimensional intensity distribution in the focal region is presented, which is based on the knife-edge method and on tomographic reconstruction.

引用

页码：109 / 113

页数：5

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