迈向光学超分辨率的亚衍射聚焦极限。

Toward the subdiffraction focusing limit of optical superresolution.

作者信息

Kalosha V P, Golub I

机构信息

Department of Physics, University of Ottawa, 150 Louis Pasteur, Ottawa, ON, K1N 6N5, Canada.

出版信息

Opt Lett. 2007 Dec 15;32(24):3540-2. doi: 10.1364/ol.32.003540.

DOI:10.1364/ol.32.003540

PMID:18087535

Abstract

A superresolving three-zone plate is applied to a Fresnel diffractive lens. It is shown that for radial incident polarization this combination produces a focal spot approaching superresolution allowed subdiffractive limit of 0.36lambda/NA for focusing. For media responsive to longitudinal field component only, our phase engineering scheme results in a focal spot size of 0.368lambda/NA. When used with a solid immersion lens, the scheme can generate the smallest focal spot available for passive optics.

摘要

一种超分辨三区板被应用于菲涅耳衍射透镜。结果表明，对于径向入射偏振，这种组合产生的焦斑接近聚焦时允许的亚衍射极限0.36λ/NA的超分辨率。对于仅对纵向场分量有响应的介质，我们的相位工程方案导致焦斑尺寸为0.368λ/NA。当与固体浸没透镜一起使用时，该方案可以产生被动光学可用的最小焦斑。