Article
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Preserved in Portico This version is not peer-reviewed
Creating An Array Of Parallel Vortical Optical Needles
Version 1
: Received: 13 February 2024 / Approved: 14 February 2024 / Online: 14 February 2024 (10:19:41 CET)
Version 2 : Received: 14 February 2024 / Approved: 15 February 2024 / Online: 15 February 2024 (09:43:18 CET)
Version 2 : Received: 14 February 2024 / Approved: 15 February 2024 / Online: 15 February 2024 (09:43:18 CET)
A peer-reviewed article of this Preprint also exists.
Šlevas, P.; Orlov, S. Creating an Array of Parallel Vortical Optical Needles. Photonics 2024, 11, 203. Šlevas, P.; Orlov, S. Creating an Array of Parallel Vortical Optical Needles. Photonics 2024, 11, 203.
Abstract
We propose a method for creating parallel Bessel-like vortical optical needles with an arbitrary axial intensity distribution via superposition of different cone-angle Bessel vortices. We analyze the interplay between the separation of individual optical vortical needles and their respective lengths and introduce a super-Gaussian function as their axial profile. We also analyze the physical limitations to observe well-separated optic needles, as they are influenced by mutual interference of the individual beams. To verify our theoretical and numerical results, we generate controllable spatial arrays of individual Bessel beams with various numbers and spatial separations by altering the spectrum of the incoming laser beam via the spatial light modulator. We demonstrate experimentally how to implement such beams using a diffractive mask. The presented method facilitates the creation of diverse spatial intensity distributions in three dimensions, potentially finding applications in specific microfabrication tasks or other contexts. These beams may have benefits in laser material processing applications such as nanochannel machining, glass via production, modification of glass refractive indices, and glass dicing.
Keywords
diffraction; optical engineering; spatial light modulator; Bessel beam; optical vorte; optical needle; focal line; translation of Bessel beams
Subject
Physical Sciences, Optics and Photonics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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