Mesoscale Laser 3D Printing

Jonušauskas, Linas; Gailevičius, Darius; Rekštytė, Sima; Baldacchini, Tommaso; Juodkazis, Saulius; Malinauskas, Mangirdas

doi:10.20944/preprints201810.0384.v1

Cited by 17 publications

(26 citation statements)

References 33 publications

(46 reference statements)

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“…Although the TPP-DLW/pyrolysis fabrication route developed in this work is limited to small specimens, plate-lattices with exceptional size-strengthened constituent materials may be manufactured by more scalable techniques (e.g., projection micro-stereolithography 49 ) using preceramic resins which exploit size effects into the micrometer range coupled with dramatically reduced shrinkage during pyrolysis 43 . Hence, plate-nanolattices deserve strong attention in the development of scalable highresolution additive manufacturing processes 50,51 , which might in the future make carbon-based nanoarchitected metamaterials as ubiquitous as carbon composites have become in modern engineering applications.…”

Section: Discussionmentioning

confidence: 99%

Plate-nanolattices at the theoretical limit of stiffness and strength

et al. 2020

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Though beam-based lattices have dominated mechanical metamaterials for the past two decades, low structural efficiency limits their performance to fractions of the Hashin-Shtrikman and Suquet upper bounds, i.e. the theoretical stiffness and strength limits of any isotropic cellular topology, respectively. While plate-based designs are predicted to reach the upper bounds, experimental verification has remained elusive due to significant manufacturing challenges. Here, we present a new class of nanolattices, constructed from closedcell plate-architectures. Carbon plate-nanolattices are fabricated via two-photon lithography and pyrolysis and shown to reach the Hashin-Shtrikman and Suquet upper bounds, via in situ mechanical compression, nano-computed tomography and micro-Raman spectroscopy. Demonstrating specific strengths surpassing those of bulk diamond and average performance improvements up to 639% over the best beam-nanolattices, this study provides detailed experimental evidence of plate architectures as a superior mechanical metamaterial topology.

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Section: Discussionmentioning

confidence: 99%

Plate-nanolattices at the theoretical limit of stiffness and strength

et al. 2020

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“…Note that PWBs usually fit completely into the accessible write field area. For larger structures, stitch-less lithography based on galvanometric mirrors that are synchronized to sample stage movement could be beneficial 36 . As a lithography light source, we use a fs-laser with a pulse length of 100 fs (FemtoFibre pro NIR, Toptica) and a repetition rate of 80 MHz.…”

Section: Fabricationmentioning

confidence: 99%

Hybrid multi-chip assembly of optical communication engines by in situ 3D nano-lithography

et al. 2020

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Three-dimensional (3D) nano-printing of freeform optical waveguides, also referred to as photonic wire bonding, allows for efficient coupling between photonic chips and can greatly simplify optical system assembly. As a key advantage, the shape and the trajectory of photonic wire bonds can be adapted to the mode-field profiles and the positions of the chips, thereby offering an attractive alternative to conventional optical assembly techniques that rely on technically complex and costly high-precision alignment. However, while the fundamental advantages of the photonic wire bonding concept have been shown in proof-of-concept experiments, it has so far been unclear whether the technique can also be leveraged for practically relevant use cases with stringent reproducibility and reliability requirements. In this paper, we demonstrate optical communication engines that rely on photonic wire bonding for connecting arrays of silicon photonic modulators to InP lasers and single-mode fibres. In a first experiment, we show an eight-channel transmitter offering an aggregate line rate of 448 Gbit/s by low-complexity intensity modulation. A second experiment is dedicated to a four-channel coherent transmitter, operating at a net data rate of 732.7 Gbit/sa record for coherent silicon photonic transmitters with co-packaged lasers. Using dedicated test chips, we further demonstrate automated mass production of photonic wire bonds with insertion losses of (0.7 ± 0.15) dB, and we show their resilience in environmental-stability tests and at high optical power. These results might form the basis for simplified assembly of advanced photonic multi-chip systems that combine the distinct advantages of different integration platforms.

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“…A full description of the experimental setup can be found in a previous publication 27 . 3DPoli software was used to manage laser beam positioning inside the resin by controlling stages and scanners 32 .…”

Section: Methodsmentioning

confidence: 99%

A Bio-Based Resin for a Multi-Scale Optical 3D Printing

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Kašėtaitė

et al. 2020

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Materials obtained from renewable sources are emerging to replace the starting materials of petroleumderived plastics. They offer easy processing, fulfill technological, functional and durability requirements at the same time ensuring increased bio-compatibility, recycling, and eventually lower cost. On the other hand, optical 3D printing (O3DP) is a rapid prototyping tool (and an additive manufacturing technique) being developed as a choice for efficient and low waste production method, yet currently associated with mainly petroleum-derived resins. Here we employ a single bio-based resin derived from soy beans, suitable for O3DP in the scales from nano-to macro-dimensions, which can be processed even without the addition of photoinitiator. The approach is validated using both state-of-the art laser nanolithography setup as well as a widespread table-top 3D printer-sub-micrometer accuracy 3D objects are fabricated reproducibly. Additionally, chess-like figures are made in an industrial line commercially delivering small batch production services. Such concept is believed to make a breakthrough in rapid prototyping by switching the focus of O3DP to bio-based resins instead of being restricted to conventional petroleum-derived photopolymers. Bio-based polymers are emerging as replacement for petroleum-derived polymers. The growth of the production and market is 2.05 Mtons of bio-plastics 1 and 700 bilion Euros in Europe only 2. The main advantages of bio-based plastic products compared to the conventional plastics are the preservation of fossil resources by using bio-mass which is a renewable resource and provision of the unique potential of carbon neutrality, as well as bio-degradability of the certain types of bio-plastics which offers additional means of recovery at the end of a product's life 3. The spectrum of bio-based plastics usage varies from nanocomposites 4-8 and films 9-11 to adsorbents 12-14. Vegetable oils are potential starting materials for the preparation of polymers due to their ready availability, inherent bio-degradability, negligible toxicity, and existence of modifiable functional groups 15. Nowadays there are a lot of scientific research dedicated to the light induced polymerization. As there exist diverse technical implementations of this technology, it is known in many names: lithography (stereolithography, digital light processing (DLP)/projection lithography), direct laser writing (DLW) or alternatively laser direct writing (LDW), two-photon polymerization (2PP), nonlinear lithography (NLL), multi-photon lithography (MPL), etc. However, this additive manufacturing process simply can be called by one common name: optical 3D printing (O3DP) as it is based on photons. This rapid prototyping tool is being developed as a choice for efficient and low waste production tool, yet currently associated with mainly petroleum-derived resins 16-19. On the other hand, O3DP in combination with post-processing (thermal-treatment) allows fabrication of free-form structures which can serve as 3D templates f...

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Mesoscale Laser 3D Printing

Cited by 17 publications

References 33 publications

Plate-nanolattices at the theoretical limit of stiffness and strength

Plate-nanolattices at the theoretical limit of stiffness and strength

Hybrid multi-chip assembly of optical communication engines by in situ 3D nano-lithography

A Bio-Based Resin for a Multi-Scale Optical 3D Printing

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