High-numerical-aperture focusing of radially polarized doughnut beams with a parabolic mirror and a flat diffractive lens

被引：136

作者：

Davidson, N ^{[1
]}

Bokor, N

机构：

[1] Weizmann Inst Sci, Dept Phys Compex Syst, IL-76100 Rehovot, Israel

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

来源：

OPTICS LETTERS | 2004年 / 29卷 / 12期

关键词：

D O I：

10.1364/OL.29.001318

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Recently, Dorn et al. [Phys. Rev. Lett. 91, 233901 (2003)] demonstrated the significance of radially polarized doughnut beams in obtaining very small focal spots (with an area of similar to0.26lambda(2)) with high-numerical-aperture (NA) aplanatic microscope objectives. We propose two simple alternative ways to focus such radially polarized beams: a parabolic mirror and a flat diffractive lens. Because of their large apodization factor for a high NA, a significant further reduction in spot area (up to a factor of 1.76 at a NA of 1) compared with the aplanatic system can be achieved. (C) 2004 Optical Society of America.

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页码：1318 / 1320

页数：3

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