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Creation of diffraction-limited non-Airy multifocal arrays using a spatially shifted vortex beam

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posted on 2024-07-09, 15:21 authored by Han Lin, Min Gu
Diffraction-limited non-Airy multifocal arrays are created by focusing a phase-modulated vortex beam through a high numerical-aperture objective. The modulated phase at the back aperture of the objective resulting from the superposition of two concentric phase-modulated vortex beams allows for the generation of a multifocal array of cylindrically polarized non-Airy patterns. Furthermore, we shift the spatial positions of the phase vortices to manipulate the intensity distribution at each focal spot, leading to the creation of a multifocal array of split-ring patterns. Our method is experimentally validated by generating the predicted phase modulation through a spatial light modulator. Consequently, the spatially shifted circularly polarized vortex beam adopted in a dynamic laser direct writing system facilitates the fabrication of a split-ring microstructure array in a polymer material by a single exposure of a femtosecond laser beam.

Funding

CE110001018:ARC

Copepod Resting Eggs As a Predator Avoidance Mechanism

Directorate for Biological Sciences

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PDF (Published version)

ISSN

0003-6951

Journal title

Appl. Phys. Lett.

Volume

102

Issue

8

Article number

article no. 084103

Publisher

American Institute of Physics

Copyright statement

Copyright © 2013 American Institute of Physics. the published version is reproduced with the permission of the publisher. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

Language

eng

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