Article
Optics
Xizhen Xu, Jun He, Jia He, Baijie Xu, Runxiao Chen, Ying Wang, Yatao Yang, Yiping Wang
Summary: SFBGs fabricated using filamentation process exhibit enhanced reflectivity and increased cross-sectional area of refractive index modulations. The fabrication process is efficient and cost-effective, with a production time of only 1.1 seconds. These high-temperature resistant SFBGs can be utilized as quasi-distributed high-temperature sensors, showing great potential in various industries such as metallurgical, chemical, and aviation.
Article
Chemistry, Multidisciplinary
Matteo Mastellone, Alessandro Bellucci, Marco Girolami, Valerio Serpente, Riccardo Polini, Stefano Orlando, Antonio Santagata, Elisa Sani, Frank Hitzel, Daniele M. Trucchi
Summary: This study demonstrates, for the first time, the achievement of two-dimensional laser-induced periodic surface structures with deep-subwavelength periodicity on diamond surfaces. The method involves using two temporally delayed and cross-polarized femtosecond-laser pulses to achieve distinctive nanotexturing, which can be controlled by varying the number of pulses. The effective treatment of large areas of diamond surfaces under scanning mode leads to significantly enhanced absorptance in the visible range, paving the way for the development of metasurfaces for future diamond-based optoelectronic devices.
Article
Materials Science, Coatings & Films
Ambra Guarnaccio, Claudia Belviso, Pietro Montano, Francesco Toschi, Stefano Orlando, Gabriele Ciaccio, Sergio Ferreri, Dimitri Trevisan, Donato Mollica, Giovanni P. Parisi, Patrizia Dolce, Alessandro Bellucci, Adriana De Stefanis, Daniele M. Trucchi, Veronica Valentini, Antonio Santagata, Francesco Cavalcante, Antonio Lettino, Luca Medici, Pietro P. Ragone, Vito G. Lambertini
Summary: This study aims to enhance the surface morphology of polypropylene for specific automotive applications using laser surface texturing technique, which alters the wetting properties of the polymer surface. The findings demonstrate that femtosecond laser treatment is an effective alternative to flame treatments for improving paint adhesion to polypropylene surfaces in the automotive industry.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Salome Basset, Guillaume Heisbourg, Alina Pascale-Hamri, Stephane Benayoun, Stephane Valette
Summary: In this study, we achieved superhydrophobicity on stainless steel surfaces by designing micrometric pillars using a femtosecond laser. We investigated the wetting behavior evolution as a function of time and chemical environment, and found that the steady-state contact angles remained above 130 degrees 250 days after laser texturing. Comparing the results with undisturbed surfaces, we observed significant changes in droplet behavior when wetting measurements were conducted on unstable surfaces.
Article
Chemistry, Multidisciplinary
Girolamo Mincuzzi, Alexandra Bourtereau, Laura Gemini, Sergi Parareda, Sylwia Rzepa, Martina Koukolikova, Pavel Konopik, Rainer Kling
Summary: This study aims to assess the feasibility of producing laser-functionalised 3D complex products through the forming of laser-treated thin metallic sheets. By optimizing the morphology of LIPSS and conducting mechanical tests, the impact of LIPSS on the mechanical properties of the foils was evaluated.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Tomas Baldi-Boleda, Carles Colominas, Andres Garcia-Granada
Summary: In this study, different coatings were applied to steel samples and laser texturing techniques were used to create surface texture structures. The structures were characterized using microscopy techniques and the periodicity and order of the textures were analyzed using Fourier transform methods.
Article
Chemistry, Multidisciplinary
Yulia Borodaenko, Stanislav Gurbatov, Mikhail Tutov, Alexey Zhizhchenko, Sergei A. Kulinich, Aleksandr Kuchmizhak, Aleksandr Mironenko
Summary: The study demonstrates the single-step laser-assisted fabrication of anti-reflective hierarchical surface textures on silicon with a locally functionalized photoluminescent molecular nanolayer. The dual-scale surface textures exhibit remarkable light-absorbing properties and enhanced fluorescence yield, showing potential for innovative multifunctional sensing devices. pH sensing tests confirm the retention of molecular sensory properties on the nanotextured substrate, suggesting the liquid-assisted laser processing as a key technology for developing novel sensing devices.
Article
Chemistry, Physical
S. Maragkaki, G. D. Tsibidis, L. Haizer, Z. Papa, R. Flender, B. Kiss, Z. Marton, E. Stratakis
Summary: This study investigates the effects of ultrashort pulsed laser sources in the mid-infrared spectral region on the surface modification and patterning of metallic and semiconducting materials. The results show that surface topographies with both high and low spatial frequency induced periodic structures can be produced at a wavelength of 3200 nm and a pulse duration of 45 fs. This research demonstrates the potential of surface structuring with mid-IR pulses for advanced industrial laser applications.
APPLIED SURFACE SCIENCE
(2023)
Article
Optics
Bo Zhao, Xiaofang Zhou, Xin Zheng, Ruiping Wang, Yucai Lin, Tingting Zou, Zhenfen Huang, Changming Huang, Jianjun Yang
Summary: Manipulation of material properties through femtosecond laser-induced periodic surface structures is a major challenge for single-beam femtosecond laser irradiation. In this study, we developed a strategy to uniformly generate large-area periodic nanostructures on molybdenum surface using double time-delayed femtosecond blue lasers with orthogonal linear polarizations. Through adjusting the energy fluence ratios between the two laser pulses, three different types of periodic surface structures can be controlled. The obtained structural sizes and periods are approximately 140 nm and 260 nm, respectively. This research contributes to the advancement of femtosecond laser nanostructuring.
OPTICS AND LASER TECHNOLOGY
(2023)
Review
Materials Science, Multidisciplinary
Ishwer Shivakoti, Golam Kibria, Robert Cep, Bal Bahadur Pradhan, Ashis Sharma
Summary: Laser surface texturing (LST) is an effective method for generating texture on work surface and has shown tremendous potential for biomedical applications, improving the efficacy of biomaterials significantly. It has extreme potential for surface modification of biomaterial and can be utilized for biomedical applications.
Article
Materials Science, Multidisciplinary
T. Soria-Biurrun, A. Dorronsoro-Larbide, J. Navarrete-Cuadrado, L. Lozada-Cabezas, A. Pan-Cabo, E. Castano-Carmona, J. Alkorta, J. M. Sanchez-Moreno
Summary: This study utilized femtosecond pulsed laser ablation to produce laser induced periodic surface structures (LIPSS) on the surface of a WC-Co turning insert. The effects of energy density and spot size on material removal efficiency and the form factor of the chamfered cutting edge during chamfering process were investigated.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Ceramics
Rui Pan, Dong Yang, Taoshuai Zhou, Yinghao Feng, Zhisen Dong, Zhaoyang Yan, Peng Li, Jin Yang, Shujun Chen
Summary: A direct joining of sapphire and Fe-36Ni alloy was achieved using femtosecond laser micro-welding. The joint had no voids or microcracks, with a narrow interface width less than 1 μm. The chemically bonded and mechanically interlocked interface demonstrated jagged features due to cold machining. The technique shows promise for joining materials with different physical properties and has benefits for manufacturing high precision optomechanical components.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Faze Chen, Wenchao Liu, Dawei Zhang
Summary: In this study, a method to improve the hydrophilicity of PTFE surface using femtosecond laser texturing assisted cold plasma modification was proposed. The surface of PTFE was roughened and made hydrophilic through texture treatment and cold plasma modification. The hierarchically rough and hydrophilic PTFE surface allowed for a robust adhesive interface with copper, leading to improved bonding strength.
APPLIED SURFACE SCIENCE
(2023)
Article
Optics
Gian-Luca Roth, Stefan Kefer, Steffen Hessler, Cemal Esen, Ralf Hellmann
Summary: The study presents the fabrication of integrated photonic crystal waveguides inside transparent polymers using femtosecond lasers. By generating hexagonal photonic lattice-like waveguides, the limitations caused by minor refractive index changes are overcome, allowing for light confinement and transmission.
LASER & PHOTONICS REVIEWS
(2021)
Article
Engineering, Chemical
Nursyahirah Mohd Shatar, Mohd Faizul Mohd Sabri, Mohd Faiz Mohd Salleh, Mohd Hanafi Ani, Xitong Xie, Arnaud Weck
Summary: The decline in freshwater availability has led to research on solar desalination technology. This paper introduces the use of femtosecond laser texturing to create a porous surface on the PMMA cover of a solar still, resulting in improved filmwise condensation. The modified surface enhances the productivity of the solar still and remains stable after repeated exposure to water vapour.
Article
Biochemistry & Molecular Biology
Denver P. Linklater, Phuc H. Le, Arturo Aburto-Medina, Russell J. Crawford, Shane Maclaughlin, Saulius Juodkazis, Elena P. Ivanova
Summary: A biomimetic nanostructured surface inspired by dragonfly wings was developed, which exhibited antifungal and fungicidal properties by physically rupturing attaching fungal spores upon contact. The hydrophilic nature of the nanostructured surface was found to be crucial for its antifungal activity.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Optics
Peichao Wu, Xiaowen Cao, Wubo Chu, Zhihao Chen, Hongbing Yuan, Rujia Wang, Songbai Yao, Saulius Juodkazis, Wenwu Zhang
Summary: With the rapid development of micro-optical applications, there is an increasing demand for micro-optical elements that can be made with minimal processing steps. This study reports on the fabrication of diamond Fresnel zone plates (FZPs) by femtosecond laser direct writing, which provide a compact solution for focusing and imaging. The fabricated FZPs showed well-defined geometry and excellent focusing and imaging ability, making them suitable for various potential applications.
Article
Optics
Shivasubramanian Gopinath, Praveen Periysamy Angamuthu, Tauno Kahro, Andrei Bleahu, Francis Gracy Arockiaraj, Daniel Smith, Soon Hock Ng, Saulius Juodkazis, Kaupo Kukli, Aile Tamm, Vijayakumar Anand
Summary: In this study, a large-area diffractive lens with three sub-aperture diffractive lenses was realized using a Golay-like configuration, which relaxes the fabrication constraints and improves the imaging resolution. The computational optical experiments demonstrated enhanced optical and computational imaging resolutions compared to previous studies.
Article
Chemistry, Multidisciplinary
Giedrius Balcas, Mangirdas Malinauskas, Maria Farsari, Saulius Juodkazis
Summary: This article provides an overview of a recent advancement in optical 3D printing, where crosslinkable materials and nanomaterial fillers are polymerized and guided to form final structures and new composites through high temperature annealing (HTA). By using ultrafast laser direct writing, 3D nano/micro-structures are defined and their precursor composition is tailored for subsequent tunability of final properties during the HTA process at temperatures between 750-1500 degrees C. This method takes advantage of efficient pyrolysis and calcination, facilitated by the large surface-to-volume ratio conditions, to enable chemical exchange between glass/ceramic and surrounding materials.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jaworski C. C. Capricho, Tzu-Ying Liao, Boon Xian Chai, Ahmed Al-Qatatsheh, Jitraporn (Pimm) Vongsvivut, Peter Kingshott, Saulius Juodkazis, Bronwyn Louise Fox, Nishar Hameed
Summary: This study demonstrates the potential of macroradical epoxies as surface coating materials, with the use of magnets during polymerization. The magnetically oriented and stable radicals in the polymer backbone render the coatings antimicrobial.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Optics
Yi-shi Xu, Zhen-ze Li, Zi-han Wang, Hong Xia, Yue-feng Liu, Saulius Juodkazis, Qi-dai Chen, Lei Wang
Summary: Femtosecond laser-induced deep-subwavelength structures have gained attention as a nanoscale surface texturization technique. Non-reciprocal writing via tailored optical far-field exposure is demonstrated, achieving continuous manipulation of ripple period on indium tin oxide (ITO) film. A full electromagnetic model is developed to explain the formation of ripples and the asymmetry of focal spot determines the non-reciprocity. This non-reciprocal writing technique offers new possibilities for precise and controllable nanoscale surface texturing.
Article
Optics
Yi-Shi Xu, Zhen-Ze Li, Hua Fan, Yue-Feng Liu, Hong Xia, Saulius Juodkazis, Qi-Dai Chen, Lei Wang
Summary: This study demonstrates the formation mechanism of laser-induced periodic surface structures (LIPSS) from a nanohole seed structure to high-spatial-frequency LIPSS using a tightly focused and rectangular-shaped laser beam with different shape-polarization orientations. A quantitative match between modeling and experiment is achieved by forming LIPSS based on light intensity distribution. The results reveal the step-like and deterministic process of LIPSS evolution and the dominant structural near-field enhancement on the ripple formation.
Article
Chemistry, Physical
Jovan Maksimovic, Haoran Mu, Molong Han, Daniel Smith, Tomas Katkus, Vijayakumar Anand, Yoshiaki Nishijima, Soon Hock Ng, Saulius Juodkazis
Summary: Ultra-short 230 fs laser pulses of 515 nm wavelength were focused to 700 nm spots on a Cr etch mask, creating similar to 400 nm nano-holes. The ablation threshold was found to be 2.3 nJ/pulse, and lower energies produced nano-disks while higher energies produced nano-rings. The controlled alloying of Si and Cr on large surface areas with sub-diffraction resolution was achieved using subtle sub-1 nJ pulse energy control.
Article
Polymer Science
Ahmed Al-Qatatsheh, Jaworski C. C. Capricho, Paolo Raiteri, Saulius Juodkazis, Nisa Salim, Nishar Hameed
Summary: The increasing demand for reliable and reproducible protocols in predicting the properties of novel materials, particularly rapidly cured epoxy resins with additives, has emphasized the power of computational modeling and simulation to establish links between intrinsic properties and atomic structure. This study introduces a novel computational modeling and simulation protocol for crosslinking rapidly cured epoxy resin thermosets using solvate ionic liquid (SIL). The protocol combines quantum mechanics (QMs) and molecular dynamics (MDs) approaches to provide a wide range of thermo-mechanical, chemical, and mechano-chemical properties that agree with experimental data.
Article
Optics
Amudhavel Jayavel, Shivasubramanian Gopinath, Praveen Periyasamy Angamuthu, Francis Gracy Arockiaraj, Andrei Bleahu, Agnes Pristy Ignatius Xavier, Daniel Smith, Molong Han, Ivan Slobozhan, Soon Hock Ng, Tomas Katkus, Aravind Simon John Francis Rajeswary, Rajesh Sharma, Saulius Juodkazis, Vijayakumar Anand
Summary: Pattern recognition techniques are essential for incoherent linear shift-invariant systems. The point spread function (PSF) samples object information in a camera system, which can be used for deblurring the object image. Deep learning-based image classification for computer vision applications has gained attention, and the quality of images plays a crucial role in classification accuracy. In this study, the Lucy-Richardson-Rosen algorithm (LR(2)A) was implemented to deblur images recorded with spatio-spectral aberrations, and it showed superior performance compared to other techniques. The LR(2)A was also applied to improve the image classification performances of deep convolutional neural networks.
Article
Optics
Daniel Smith, Soon Hock Ng, Amanda Tang, Tomas Katkus, Daniel Moraru, Saulius Juodkazis
Summary: Ultra-short laser pulses were used to laser ablate the surface of crystalline sapphire at high intensity. Annealing at high temperature led to surface reconstruction and reduction of surface roughness. The 3D shape of a micro-lens was not altered after annealing.
Article
Chemistry, Multidisciplinary
Subham Ranjan, Meguya Ryu, Ryota Morioka, Shuji Kamegaki, Soon Hock Ng, Daniel Smith, Jitraporn Vongsvivut, Mark J. Tobin, Saulius Juodkazis, Junko Morikawa, Satoshi Takamizawa
Summary: A unique scissor-like two-directional ferroelastic deformation was achieved in organic crystals, shedding light on the understanding of multidirectional deformations in organic compounds. The study also revealed a correlation between the anisotropic structural arrangement and the difference in thermal diffusivity and mechanical behavior.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Hsin-Hui Huang, Saulius Juodkazis, Eugene G. Gamaly, Vladimir T. Tikhonchuk, Koji Hatanaka
Summary: This study analyzes the processes produced by the interaction of two subsequent ultra-short laser pulses with a water flow, and finds that this interaction generates strong THz pulses and enhanced X-ray emission. It is demonstrated that these emissions are produced by the interaction of a main laser pulse with liquid water ejected from the surface by a pre-pulse, resulting in the acceleration of energetic electron beams. This scheme enables efficient energy conversion in THz pulses.
Article
Materials Science, Multidisciplinary
Shuji Kamegaki, Daniel Smith, Meguya Ryu, Soon Hock Ng, Hsin-Hui Huang, Pegah Maasoumi, Jitraporn Vongsvivut, Daniel Moraru, Tomas Katkus, Saulius Juodkazis, Junko Morikawa
Summary: A four-polarisation camera was used to map the absorbance of olivine micro-grains before and after high-temperature annealing. It was found that high-temperature annealing caused magnetization of olivine xenoliths. Different operating modes of the polariscope were used to validate the three-point fit method for analyzing the birefringence and absorbance of the samples in transmission and reflection modes.
Article
Engineering, Manufacturing
Edvinas Skliutas, Danielius Samsonas, Arunas Ciburys, Lukas Kontenis, Darius Gailevicius, Jonas Berzins, Donatas Narbutas, Vytautas Jukna, Mikas Vengris, Saulius Juodkazis, Mangirdas Malinauskas
Summary: Multiphoton photopolymerisation (MPP), also known as 3D nanoprinting, was studied using a wavelength-tunable femtosecond laser. The influence of wavelength on the dynamic fabrication window (DFW) and the control over voxel aspect ratio were investigated. The results show that optimizing the wavelength can significantly improve the efficiency of 3D nanoprinting in various applications.
VIRTUAL AND PHYSICAL PROTOTYPING
(2023)
