3D holographic light shaping for advanced multiphoton polymerization

Manousidaki, Maria; Papazoglou, D. G.; Farsari, Maria; Tzortzakis, S.

doi:10.1364/ol.45.000085

Cited by 35 publications

(17 citation statements)

References 34 publications

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“…In particular, by increasing the concentration of TPA-BBS , the threshold can be further reduced, showing the great potential of this compound for application in 2PP systems where much less laser power P ave is available. Such applications include systems with more economical low-power lasers, which, due to the significant reduction of cost and footprint, allow the acquisition and operation of multiple 2PP systems as well as advanced technologies permitting ultrafast 2PP by dynamic optical tuning of the voxel size, 40 , 68 simultaneous polymerization using multiple laser foci, 28 , 69 , 70 or focal field engineering. 71 All these applications further benefit from the use of high-performance 2P photoinitiators, especially if operated at elevated scanning speeds or when low-magnification objectives are used.…”

Section: Discussionmentioning

confidence: 99%

Beyond the Threshold: A Study of Chalcogenophene-Based Two-Photon Initiators

et al. 2022

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A series of nine soluble, symmetric chalcogenophenes bearing hexyl-substituted triphenylamines, indolocarbazoles, or phenylcarbazoles was designed and synthesized as potential two-photon absorption (2PA) initiators. A detailed photophysical analysis of these molecules revealed good 2PA properties of the series and, in particular, a strong influence of selenium on the 2PA cross sections, rendering these materials especially promising new 2PA photoinitiators. Structuring and threshold tests proved the efficiency and broad spectral versatility of two selenium-containing lead compounds as well as their applicability in an acrylate resin formulation. A comparison with commercial photoinitiators Irg369 and BAPO as well as sensitizer ITX showed that the newly designed selenium-based materials TPA-S and TPA-BBS outperform these traditional initiators by far both in terms of reactivity and dose. Moreover, by increasing the ultralow concentration of TPA-BBS , a further reduction of the polymerization threshold can be achieved, revealing the great potential of this series for application in two-photon polymerization (2PP) systems where only low laser power is available.

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Section: Discussionmentioning

confidence: 99%

Beyond the Threshold: A Study of Chalcogenophene-Based Two-Photon Initiators

et al. 2022

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“…The (bio)fabrication time of this holographic 2P-SL is proportionally reduced with the number of generated focal points. [539][540][541] Another aspect that might limit the achievement of high resolution and structure fidelity, in particular with relatively soft materials such as hydrogels, are the time-dependent swelling and shrinkage that take place upon crosslinking or degradation. As these geometrical changes are often not predictable, an optimized CAD design that takes this aspect into consideration remains an open challenge.…”

Section: P-microfabrication Limitations and Outlookmentioning

confidence: 99%

Guiding Lights: Tissue Bioprinting Using Photoactivated Materials

et al. 2020

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Photo-activated materials have found widespread use in biological and medical applications and are playing an increasingly important role in the nascent field of three-dimensional (3D) bioprinting. Light can be used as a trigger to drive the formation or the degradation of chemical bonds, leading to unprecedented spatiotemporal control over a material's chemical, physical, and biological properties. With resolution and construct size ranging from nanometres to centimeters, light-mediated biofabrication allows multicellular and multimaterial approaches. It promises to be a powerful tool to mimic the complex multiscale organization of living tissues including skin, bone, cartilage, muscle, vessels, heart, and liver, among others, with increasing organotypic functionality. With this review, we comprehensively discuss photochemical reactions, photo-activated materials, and their use in state-of-the-art deposition-based (extrusion and droplet) and vat polymerization-based (one-and two-photon) bioprinting. By offering an up-to-date view on these techniques, we identify emerging trends, focusing on both the chemistry and instrument aspects, thereby allowing the readers to select the best-suited approach. Starting with photochemical reactions and photo-activated materials, we then discuss principles, applications, and limitations of each technique. With a critical eye to the most recent achievements, the reader is guided through this exciting, emerging field with special emphasis on cell-laden hydrogel constructs.

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“…In fact, FLM is a serial writing technique and cannot compete with parallel photolithographic microfabrication for very large volume of devices. The gap is progressively reducing thanks to the much smaller number of steps required to produce a complete photonic circuit, to the increasing processing speeds that have now reached several cm/s, and to the various strategies that are being developed to parallelize the irradiation process [65][66][67][68]. In addition, mass production is not yet an issue in quantum technologies, since potentially commercial devices are still under development, whereas the capability of providing customtailored components that can be prototyped rapidly and at low cost is a very relevant feature.…”

Section: Advantages Of Flm For Integrated Quantum Photonicsmentioning

confidence: 99%

Femtosecond laser micromachining for integrated quantum photonics

Corrielli,

Crespi,

Osellame

2021

Preprint

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Integrated quantum photonics, i.e. the generation, manipulation and detection of quantum states of light in integrated photonic chips, is revolutionizing the field of quantum information in all applications, from communications to computing. Although many different platforms are being currently developed, from silicon photonics to lithium niobate photonic circuits, none of them has shown the versatility of femtosecond laser micromachining (FLM) in producing all the components of a complete quantum system, encompassing quantum sources, reconfigurable state manipulation, quantum memories and detection. It is in fact evident that FLM has been a key enabling tool in the first-time demonstration of many quantum devices and functionalities. Although FLM cannot achieve the same level of miniaturization of other platforms, it still has many unique advantages for integrated quantum photonics. In particular, in the last five years, FLM has greatly expanded its range of quantum applications with several scientific breakthroughs achieved. For these reasons, we believe that a review article on this topic is very timely and could further promote the development of this field by convincing end-users of the great potentials of this technological platform and by stimulating more research groups in FLM to direct their efforts to the exciting field of quantum technologies.

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3D holographic light shaping for advanced multiphoton polymerization

Cited by 35 publications

References 34 publications

Beyond the Threshold: A Study of Chalcogenophene-Based Two-Photon Initiators

Beyond the Threshold: A Study of Chalcogenophene-Based Two-Photon Initiators

Guiding Lights: Tissue Bioprinting Using Photoactivated Materials

Femtosecond laser micromachining for integrated quantum photonics

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