Enlightening darkness to diffraction limit and beyond: comparison and optimization of different polarizations for dark spot generation

被引：46

作者：

Khonina, Svetlana N. ^{[1
]}

Golub, Ilya ^{[2
]}

机构：

[1] Russian Acad Sci, Image Proc Syst Inst, Samara 443001, Russia

[2] Algonquin Coll, Sch Adv Technol, Ottawa, ON K2G 1V8, Canada

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 2012年 / 29卷 / 07期

关键词：

RADIAL POLARIZATION; SUPERRESOLUTION; INTENSITY; FIELD;

D O I：

10.1364/JOSAA.29.001470

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We compare generation of a dark spot using focusing of beams with azimuthal polarizion, radial polarization with a vortex, and a circular polarization with either a first or second order vortex. By optimization of the amplitude-phase pupil, it is ascertained that azimuthal polarization is the most suitable one to obtain the diffraction bounded dark spot per se whose scalar approximation limit has FWHM = 0.29 lambda. Consequently, for dark spot generation, this polarization plays the role of the radial polarization in creation of the diffraction-limited bright spot. Using azimuthal polarization, it is shown that an amplitude-phase filter allows generation of a subdiffractive dark spot in a prescribed finite area. (C) 2012 Optical Society of America

引用

页码：1470 / 1474

页数：5

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