Shaping the focal field of radially/azimuthally polarized phase vortex with Zernike polynomials

Journal article (2016)

Authors

L. Wei ImPhys/Optics - AS
Paul Urbach ImPhys/Optics - AS
Research Group
ImPhys/Optics (AS) (TU Delft)
Copyright: © 2016 L. Wei, Paul Urbach
DOI: https://doi.org/10.1088/2040-8978/18/6/065608
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Published Date

2016

Language

English

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Faculty

Applied Sciences

Department

ImPhys/Imaging Physics

Research Group

ImPhys/Optics

Abstract

The focal field properties of radially/azimuthally polarized Zernike polynomials are studied. A method to design the pupil field in order to shape the focal field of radially or azimuthally polarized phase vortex is introduced. With this method, we are able to obtain a pupil field to achieve a longitudinally polarized hollow spot with a depth of focus up to 12Y and 0.28Y lateral resolution (FWHM) for an optical system with numerical aperture 0.99; a pupil field to generate eight focal spots along the optical axis is also obtained with this method.

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