Generation of a hollow dark spherical spot by 4π focusing of a radially polarized Laguerre-Gaussian beam

被引：68

作者：

Bokor, N ^{[1
]}

Davidson, N

机构：

[1] Budapest Univ Technol & Econ, Dept Phys, H-1111 Budapest 8, Hungary

[2] Weizmann Inst Sci, Dept Phys Complex Syst, IL-76100 Rehovot, Israel

来源：

OPTICS LETTERS | 2006年 / 31卷 / 02期

关键词：

D O I：

10.1364/OL.31.000149

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The properties of the focal spot for 4 pi focusing with radially polarized first-order Laguerre-Gaussian beams are calculated. It is shown that a focal spot that has an extremely sharp dark region at the center and an almost-perfect spherical symmetry can be achieved. When such a hollow dark spherical spot is used in 4 pi fluorescence depletion microscopy, an-axial FWHM spot size of similar to 39 run and a transverse FWHM spot size of similar to 64 nm can be achieved simultaneously in a practical system. (c) 2006 Optical Society of America.

引用

页码：149 / 151

页数：3

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