Generation of a linear array of focal spots with prescribed characteristic using the radiation pattern from a tapered line source antenna

Zeng, Yongxi; Yu, Yanzhong; Wu, Pinghui; Chen, Musheng; Shi-yan, Zheng; Pan, Mingyang; Zhan, Qiwen

doi:10.1016/j.optcom.2023.129329

Cited by 3 publications

(1 citation statement)

References 37 publications

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“…We used a superposition of vortical Bessel beams with specific axicon angles and complex amplitudes, as suggested in Refs. [37,38,77,[82][83][84]. We also demonstrate experimentally how to implement such beams using a spatial light modulator.…”

Section: Introductionmentioning

confidence: 93%

Creating an Array of Parallel Vortical Optical Needles

Šlevas,

Orlov

2024

Photonics

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We propose a method for creating parallel Bessel-like vortical optical needles with an arbitrary axial intensity distribution via the superposition of different cone-angle Bessel vortices. We analyzed 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 analyzed the physical limitations to observe well-separated optical needles, as they are influenced by the mutual interference of the individual beams. To verify our theoretical and numerical results, we generated 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.

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Section: Introductionmentioning

confidence: 93%

Creating an Array of Parallel Vortical Optical Needles

Šlevas,

Orlov

2024

Photonics

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Creation of Optical Tubes with Tunable Inner Diameters

Xie,

Yu,

et al. 2024

2024 International Conference on Microwave and Millimeter Wave Technology (ICMMT)

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Controllable Spatial Array of Bessel-Like Vortical Optical Needles With Different Topological Charges and Locations in the Transverse Plane

Šlevas,

Orlov

2024

Preprint

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Bessel vortices generated via axicons are widely used for various applications like optical tweezers or laser microfabrication of transparent materials. The specific intensity profile having high aspect ratios of beam width and length, in turn, generates a high aspect ratio void that resembles an optical needle or an optical bottle. In contrast to commonly generated Bessel vortices, which have a fixed axial intensity distribution. We present a novel method for engineering Bessel vortices that can have an arbitrary axial intensity distribution via superposition of different cone-angle Bessel vortices. We analytically describe spatial spectra of optical needle-like vortices having an arbitrary axial intensity distribution. We also demonstrate a superposition of independent optical Bessel-like vortices and analyze the physical limitations to observe well-separated optical 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 beams with various numbers and spatial separations by altering the spectrum of the incoming laser beam via the spatial light modulator. Lastly, we numerically examine distortions caused by propagation through the planar air-dielectric interface and show the compensation method by appropriately modifying the spectral masks.

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Generation of a linear array of focal spots with prescribed characteristic using the radiation pattern from a tapered line source antenna

Cited by 3 publications

References 37 publications

Creating an Array of Parallel Vortical Optical Needles

Creating an Array of Parallel Vortical Optical Needles

Creation of Optical Tubes with Tunable Inner Diameters

Controllable Spatial Array of Bessel-Like Vortical Optical Needles With Different Topological Charges and Locations in the Transverse Plane

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