High-Order Vector Bessel-Gauss Beams for Laser Micromachining of Transparent Materials

Baltrukonis, J. H.; Ulčinas, Orestas; Orlov, Sergej; Jukna, Vytautas

doi:10.1103/physrevapplied.16.034001

Cited by 29 publications

(16 citation statements)

References 51 publications

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“…Overall, LBM exhibits several advantages such as a simple operational environment (there is no requirement for vacuum conditions or clean room facilities), material applicability (polymers, glass, composites, metals, and semiconductors), and diverse structures. [124,125] Moreover, because this approach does not involve any toxic chemical components, LBM is a promising approach for shape-forming and modification of biodegradable polymers. [126,127] Hybrid LBM methods, one of the future development directions, can help precisely control the microstructuring of materials ranging from fluorescent polymeric structures to superhydrophobic surfaces, composite resins, and shapememory polymers, thus promoting novel applications such as micro-supercapacitors, solar cell devices, integrated photonics, anticounterfeiting devices, and optical encryption devices.…”

Section: Laser Beammentioning

confidence: 99%

Current and Future Trends for Polymer Micro/Nanoprocessing in Industrial Applications

et al. 2022

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Polymers are widely used in optical devices, electronic devices, energy‐harvesting/storage devices, and sensors, owing to their low weight, excellent flexibility, and simple fabrication process. With advancements in micro/nanoprocessing techniques and more demanding application requirements, it is becoming necessary to realize high‐resolution fabrication of polymers to prepare miniaturized devices. This is particularly because conventional processing technologies suffer from high thermal stress and strong adhesion/friction, which can irreversibly damage the micro/nanostructures of miniaturized devices. In addition, although the use of advanced fabrication methods to prepare high‐resolution micro/nanostructures is explored, these methods are limited to laboratory research or small‐batch production. This review focuses on the micro/nanoprocessing of polymeric materials and devices with high spatial precision and replication accuracy for industrial applications. Specifically, the current state‐of‐the‐art techniques and future trends for micro/nanomolding, high‐energy beam processing, and micro/nanomachining are discussed. Moreover, an overview of the fabrication and applications of various polymer‐based elements and devices such as microlenses, biosensors, and transistors is provided. These techniques are expected to be widely applied for multiscale and multimaterial processing as well as for multifunction integration in next‐generation integrated devices, such as photoelectric, smart, and biodegradable devices.

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Section: Laser Beammentioning

confidence: 99%

Current and Future Trends for Polymer Micro/Nanoprocessing in Industrial Applications

et al. 2022

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“…In this section, we report on the performance of the PBP element that was manufactured by Altechna R&D with the transmittance being higher than 90% over a broad spectral region [63]. This implementation of GPOE enables beam-shaping of high-energy beams because these elements can withstand pulses of 1.5 mJ energy and 158 fs FWHM duration at 1030 nm [41,43]. Scaling optical elements and beam size would reduce the impinging beam fluence and would enable the transformation of even higher-energy pulses [36].…”

Section: Experimental Verificationmentioning

confidence: 99%

“…Figure 7 shows the slow-axis angle distribution of the two fabricated PBP elements without (figure 7(a)) and with (figure 7(b)) the blazed grating. The retardance of both elements was fixed to λ/2 and its distribution over the full area of the element is almost constant, similar to the measurement made in [43]. Two PBP elements were necessary in order to prove our numerical hypothesis that the blazed grating does not perturb the top-hat profile as long as the deflection angle is relatively small (up to a few degrees), but enables the removal of the the zeroth-order diffraction beam, which is harmful to the quality of the resulting beam.…”

Section: Optical Setupmentioning

confidence: 99%

“…The main advantage of such elements over other implementations is a high optical damage threshold, reaching 2.2 J cm −2 at 1030 nm wavelength (212 fs regime) or 63.4 J cm −2 at 1064 nm wavelength (10 ns regime) [35,36]. The material optical damage threshold for fused silica is very close to that, therefore these optical PBP elements are flexible and reliable choices for beam shaping in laser micromachining [37][38][39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Pancharatnam–Berry phase element for the generation of the top-hat beam

Gotovski¹,

Šlevas²,

Orlov³

et al. 2022

J. Opt.

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Within optics, the Pancharatnam-Berry phase enables the design and creation of various flat special optical elements such as top-hat converters. We present a study on engineering efficient vectorial top-hat converters inscribed in glass by high-power femtosecond laser pulses. We phase-encode a top-hat converter and demonstrate how its quality is influenced by various parameters. We investigate theoretically the generation of the top-hat beam under imperfect conditions such as the mismatch of the incident beam width or the misalignment of the center of the converter. Experimental verification of the concept is also presented.

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“…These nonconventional states of light also can find their use also in imaging improvements [24][25][26] , laser microfabrication 27,28 , photonic communications 29,30 , tomographic 31 , light sheet 32 , and sub-THz microscopy 33 . High resolution is one of the main objectives of the imaging theory, and it is usually achieved with Gaussian illumination in high numerical aperture systems.…”

Section: Introductionmentioning

confidence: 99%

Terahertz structured light: nonparaxial Airy imaging using silicon diffractive optics

Ivaškevičiūtė-Povilauskienė

Kizevičius

Nacius

et al. 2022

Light Sci Appl

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Structured light – electromagnetic waves with a strong spatial inhomogeneity of amplitude, phase, and polarization – has occupied far-reaching positions in both optical research and applications. Terahertz (THz) waves, due to recent innovations in photonics and nanotechnology, became so robust that it was not only implemented in a wide variety of applications such as communications, spectroscopic analysis, and non-destructive imaging, but also served as a low-cost and easily implementable experimental platform for novel concept illustration. In this work, we show that structured nonparaxial THz light in the form of Airy, Bessel, and Gaussian beams can be generated in a compact way using exclusively silicon diffractive optics prepared by femtosecond laser ablation technology. The accelerating nature of the generated structured light is demonstrated via THz imaging of objects partially obscured by an opaque beam block. Unlike conventional paraxial approaches, when a combination of a lens and a cubic phase (or amplitude) mask creates a nondiffracting Airy beam, we demonstrate simultaneous lensless nonparaxial THz Airy beam generation and its application in imaging system. Images of single objects, imaging with a controllable placed obstacle, and imaging of stacked graphene layers are presented, revealing hence potential of the approach to inspect quality of 2D materials. Structured nonparaxial THz illumination is investigated both theoretically and experimentally with appropriate extensive benchmarks. The structured THz illumination consistently outperforms the conventional one in resolution and contrast, thus opening new frontiers of structured light applications in imaging and inverse scattering problems, as it enables sophisticated estimates of optical properties of the investigated structures.

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High-Order Vector Bessel-Gauss Beams for Laser Micromachining of Transparent Materials

Cited by 29 publications

References 51 publications

Current and Future Trends for Polymer Micro/Nanoprocessing in Industrial Applications

Current and Future Trends for Polymer Micro/Nanoprocessing in Industrial Applications

Investigation of the Pancharatnam–Berry phase element for the generation of the top-hat beam

Terahertz structured light: nonparaxial Airy imaging using silicon diffractive optics

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