Article
Materials Science, Coatings & Films
Salih Durdu, Muharrem Sancak, Emine Yalcin, Metin Usta, Eyup Akagunduz, Atilgan Altinkok
Summary: Highly ordered TiO2 nanotube arrays were prepared on Ti6Al4V substrate through anodic oxidation technique, showing good surface roughness and thickness distribution, as well as higher hydrophobicity compared to uncoated titanium surface. The hardness and elastic modulus of TiO2 nanotube surfaces were close to bone structure, with good adhesion properties between similar to 2.2 N and similar to 4.6 N.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Andrzej Grabowski, Tomasz Florian, Jakub Wieczorek, Marcin Adamiak
Summary: Experimental data on the structure, chemical composition, and wear resistance of a titanium alloy Ti6Al4V after pulsed laser treatment show that rapid solidification forms a new microstructure, affecting the surface's topography. Different laser pulse parameters can lead to desired surface texture, and femtosecond and picosecond pulse treatment creates micro/nano structures with good wear resistance. Nanosecond laser treatment results in an extended metal-oxide foam surface with transformed alpha-Ti phase.
APPLIED SURFACE SCIENCE
(2021)
Article
Biotechnology & Applied Microbiology
Hui Wang, Changyong Yuan, Kaili Lin, Rui Zhu, Shilei Zhang
Summary: This study demonstrated that a polydopamine (PDA) coating on 3D-printed implants improved their hydrophilicity, enhanced the adhesion, propagation, and osteogenic differentiation of bone marrow-derived mesenchymal stem cells (BMSCs), and improved osteointegration performance in vivo. This suggests that PDA coating could be a feasible strategy for optimizing 3D-printed implant surfaces and provides a basis for future research on immobilizing bioactive factors on these surfaces.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Engineering, Biomedical
Mohammad Pervez Mughal, Muhammad Umar Farooq, Jabir Mumtaz, Mozammel Mia, Madiha Shareef, Mahnoor Javed, Muhammad Jamil, Catalin Pruncu
Summary: Surface modification of Titanium (alpha+13) ELI medical grade alloy using powder-mixed electric discharge machining (PMEDM) enhances osseointegration by improving the interface between body tissue and implant. SiC powder concentration is crucial for controlling surface roughness and recast layer depth, with a 20 g/l concentration showing significant reductions in surface fracture density and roughness. The migration of Si and generation of promising surface texture and chemistry were confirmed through elemental mapping analysis.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Chemistry, Physical
Keila Lovera-Prado, Vicente Vanaclocha, Carlos M. Atienza, Amparo Vanaclocha, Pablo Jorda-Gomez, Nieves Saiz-Sapena, Leyre Vanaclocha
Summary: In this study, a new dental implant with improved primary stability features was evaluated using static and flexion-compression fatigue tests. The results showed that the implant fatigue limit is satisfactory for incisor and canine teeth for healthy patients, ensuring long-lasting life against loads below the fatigue limit.
Article
Chemistry, Physical
Virginia Alessandra Gobbo, Mari Lallukka, Francesca Gamna, Mirko Prato, Alessandra Vitale, Sara Ferraris, Ziba Najmi, Andrea Cochis, Lia Rimondini, Jonathan Massera, Silvia Spriano
Summary: This research focuses on developing a protocol to attach nisin, an antimicrobial peptide, to a nanotextured titanium alloy surface. The coated surface shows high surface energy, suitable for tissue integration, and releases nisin over a period longer than 1 day. The antibacterial properties were confirmed by reduced metabolic activity and viable adhered colonies of Staphylococcus aureus. This study demonstrates the potential of using chemically treated titanium surfaces coupled with nisin for bioactive and antibacterial tissue integration.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Sladana Laketic, Marko Rakin, Milos Momcilovic, Jovan Ciganovic, Dorde Veljovic, Ivana Cvijovic-Alagic
Summary: The study found that picosecond Nd:YAG laser irradiation caused chemical and morphological changes on the surfaces of commercially pure titanium and Ti-13Nb-13Zr alloy, including morphological alterations, microcracks, hydrodynamic structures, and titanium oxide formation. The increased energy absorption in the irradiation-affected area led to an increase in damaged area dimensions and surface roughness.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Optics
Ying Xu, Hengchang Bu, Feiyun Wang, Wanping Ma, Xiaohong Zhan
Summary: This paper investigates the laser joining of CFRTP and titanium alloy, and verifies the effectiveness of the joining process through numerical simulations and experiments. The results show that the tensile failure load of the joint meets the requirements under the optimized process parameters, and the fatigue failure mode under cyclic loading has also been studied.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Ying Xu, Hengchang Bu, Feiyun Wang, Wanping Ma, Xiaohong Zhan
Summary: Laser joining technology was used to connect CFRTP and titanium alloy, improving the mechanical properties. Numerical simulations and experimental results showed good agreement, validating the accuracy of the simulation model. The laser joined joint had a high tensile failure load, and exhibited fatigue failure through edge crack growth.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Xinlei Pan, Weifeng He, Zhenbing Cai, Xuede Wang, Ping Liu, Sihai Luo, Liucheng Zhou
Summary: In this study, femtosecond laser surface modification was used to improve the friction and wear performance of titanium alloys. After the laser treatment, the surface microhardness was improved by 16.6% and compressive residual stress reached -746 MPa. Laser-induced periodic surface structures with a titanium oxide outer coating were also fabricated. Wear experiments showed a significant reduction in the coefficient of friction and wear mass loss for the laser-treated specimens.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Chemistry, Physical
A. G. Aleksanyan, S. K. Dolukhanyan, O. P. Ter-Galstyan, G. N. Muradyan, N. L. Mnatsakanyan
Summary: The research focuses on developing a resource-saving and efficient technology for synthesizing Ti-6Al-4V alloy through the hydride cycle (HC) method, aiming to reduce the production cost of titanium alloys. The physicochemical, structural, and hydrogen-sorption characteristics of the alloy samples were thoroughly studied and optimized.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Coatings & Films
Donata Kuczynska-Zemla, Agata Sotniczuk, Marcin Pisarek, Adrian Chlanda, Halina Garbacz
Summary: This paper discusses the corrosion behavior of Titanium Grade 2 after non-contact laser functionalization using Direct Laser Interference Lithography (DLIL). The results show that laser-textured surfaces improve titanium corrosion resistance in physiological saline, with a more stable passive layer. The enhanced corrosion resistance in DLIL samples is mainly attributed to changes in surface topography, chemical composition, and oxide film thickness.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Jing Zhang, Zhou Yu, Jun Hu
Summary: Through plasma nitriding and plasma-enhanced chemical vapor deposition composite process modification, combined with nanosecond laser processing, the wear resistance and corrosion resistance of biological titanium alloy can be effectively improved. Test results showed that samples processed with PN + PECVD exhibited the best performance.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Marjetka Conradi, Aleksandra Kocijan, Bojan Podgornik
Summary: Laser texturing is used to improve the friction and wear resistance of Ti6Al4V alloy. The results show that surfaces with higher texture density have a more significant reduction in coefficient of friction (COF) in low-viscosity oil. However, the influence of laser texturing on COF is less pronounced in high-viscosity oil. Wear analysis reveals that laser texturing intensifies abrasive wear, especially on surfaces with higher texture density. The results suggest that the best contact conditions and wear results are achieved with high-viscosity oil on surfaces with medium-to-high texture density.
Article
Automation & Control Systems
Xiaosheng Luan, Jianbing Meng, BingQi Huang, Xiaojuan Dong, Yizhong Hu, Yugang Zhao, Hongwei Zhang, Linghui Qu
Summary: The processing technology of laser combined minimum quantity lubrication-assisted machining (LAM-MQL) significantly improves tool wear, chip shape, and surface quality of titanium alloy. Experimental results show a transformation of titanium alloy chip shape and a decrease in surface roughness due to LAM-MQL technology.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Energy & Fuels
Thiago Chellappa, Jose G. D. S. Santa Rosa, Dino L. F. Santos, Rodrigo N. Boufleur, Isadora V. D. L. Paiva, Tom Leger, Naithirithi T. Chellappa, Rubens M. Nascimento
Summary: Biodiesel composed of castor oil has excellent thermal and oxidative stabilities, and adding it to sunflower biodiesel can improve its resistance to oxidation.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Automation & Control Systems
Rita Ferreira, Angela Cunha, Oscar Carvalho, Bruno Trindade, Luis Sobral, Sandra Carvalho, Filipe Silva
Summary: A CuCoBe-diamond composite was used to reinforce a laser textured 410 stainless steel piston ring by hot-pressing. Different hot-pressing parameters were used to optimize the sintering process of the CuCoBe particles. The tribological results revealed that larger texture dimensions led to enhanced tribological performance.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Biomedical
F. Bartolomeu, O. Carvalho, M. Gasik, F. S. Silva
Summary: A home-made 3D Multi-Material Laser Powder Bed Fusion (3DMMLPBF) technology was used to manufacture novel multi-material Ti6Al4V-CoCrMo parts. This system allows for the construction of 3D Multi-Material transitions between distinct materials, point-by-point and layer-by-layer. The functional transition between Ti6Al4V and CoCrMo was analyzed and found to have a solid metallurgical bonding and 3D mechanical interlocking.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Physics, Condensed Matter
Ediones Maciel de Sousa, Antonio Bruno de Vasconcelos Leitao, Petteson Linniker Carvalho Serra, Jayane Oliveira Borges, Maria Leticia Vega, Joao Victor Barbosa Moura, Thercio Henrique de Carvalho Costa, Rubens Maribondo do Nascimento, Romulo Ribeiro Magalhaes de Sousa, Cleanio da Luz Lima
Summary: This paper investigates the growth of molybdenum trioxide thin films on AISI 316 steel using the cathodic cage plasma deposition (CCPD) technique at low temperature. The study reveals that the films deposited under 50:50 and 80:20 gases composition crystallize in the orthorhombic phase without secondary phases, with thicknesses of 5 μm and 1 μm respectively. Vickers microhardness measurements show that low temperature plasma deposition maximizes the surface hardness of AISI 316 steel with excellent adhesion and plasticity.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
J. F. M. Neto, M. Naeem, T. H. C. Costa, L. L. F. Lima, R. R. M. Sousa, M. C. Feitor, M. S. Liborio, R. M. Nascimento
Summary: In this study, a modified cathodic cage plasma deposition (CCPD) system was used to synthesize a Ti-Nb-C-N-based composite coating on AISI-4340 steel. The composite coating exhibits enhanced hardness and wear resistance due to its effective bioactivity. By inserting composite material rings on the lid of the cathodic cage, the novel CCPD system allows for the deposition of composite coatings. The results show that the modified CCPD system can improve the hardness and wear resistance of AISI-4340 steel by synthesizing the composite coating.
JOURNAL OF MATERIALS SCIENCE
(2023)
Review
Chemistry, Physical
Rita Fidalgo-Pereira, Orlanda Torres, Oscar Carvalho, Filipe S. Silva, Susana O. Catarino, Mutlu Ozcan, Julio C. M. Souza
Summary: In dentistry, clinicians use dual-cured or light-cured resin-matrix cements to enhance the physical properties of the cement through proper polymerization of the organic matrix. This study reviewed the degree of conversion, polymerization, and light transmittance of different resin-matrix cements in dentistry. The findings showed that restorative structures with thickness over 1.5 mm reduce light irradiance, leading to lower degree of conversion percentages. Dual-cured resin-matrix cements demonstrated the highest degree of conversion percentages, ranging between 55% and 75%. Optimization of polymerization can be achieved by considering parameters such as light distance, irradiance, exposure time, equipment, and wavelength.
Article
Engineering, Biomedical
Tiago Magalhaes, Rita Fidalgo-Pereira, Orlanda Torres, Oscar Carvalho, Filipe S. Silva, Bruno Henriques, Mutlu Özcan, Julio C. M. Souza
Summary: The purpose of this study was to evaluate the layer thickness and microstructure of resin-matrix cements and flowable resin-matrix composites at dentin and enamel to composite onlay interfaces after cementation on low loading magnitude. The results showed that flowable resin-matrix composites exhibited adequate flowing even at low loading magnitude. However, there were significant variations in the layer thickness of these composites and traditional resin-matrix cements, which could be attributed to clinical sensitivity and differences in rheological properties of the materials.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Review
Dentistry, Oral Surgery & Medicine
Aline Goncalves, Athenais Collard, Francisca Monteiro, David Matos, Oscar Carvalho, Rui Azevedo, Filipe S. Silva, Teresa Pinho
Summary: This systematic review evaluates the effectiveness of Invisalign(R) clear aligner on the maxillary incisors. Five relevant publications were analyzed, including four retrospective studies and one prospective study. The results show that movements with Invisalign(R) on the upper incisors have distinct accuracy, with low accuracy for incisor intrusion and high accuracy for incisor extrusion. Axial and horizontal movements are generally effective. Overall, the efficiency of aligner in achieving desired movements in the upper incisors is low, and the use of aligner features should be considered to improve accuracy.
TURKISH JOURNAL OF ORTHODONTICS
(2023)
Review
Biotechnology & Applied Microbiology
Eluana Gomes, Renato Andrade, Cristina Valente, J. Victor Santos, Joni Nunes, Oscar Carvalho, Vitor M. M. Correlo, Filipe S. S. Silva, J. Miguel Oliveira, Rui L. L. Reis, Joao Espregueira-Mendes
Summary: There is no consensus on how to measure shoulder joint laxity and the reported results lack systemization for shoulder arthrometer devices. This systematic review aims to summarize the results of available shoulder arthrometers in measuring glenohumeral laxity. The review includes 23 studies comprising 1162 shoulders, and the results show substantial heterogeneity in glenohumeral laxity values, mainly influenced by the arthrometer used and testing conditions, potentially leading to inconsistent results and impacting diagnosis and treatment decisions.
BIOENGINEERING-BASEL
(2023)
Article
Engineering, Multidisciplinary
Beatriz Ferreira Fernandes, Neusa Silva, Joana Faria Marques, Mariana Brito Da Cruz, Laura Tiainen, Michael Gasik, Oscar Carvalho, Filipe Samuel Silva, Joao Carames, Antonio Mata
Summary: This in vitro study evaluated the cellular response of human osteoblasts, gingival fibroblasts, and S. oralis when in contact with zirconia implant surfaces functionalized with BaTiO3, which has piezoelectric properties. The results suggest that these surfaces are not cytotoxic to peri-implant cells and may promote faster initial osteoblast differentiation. Additionally, they can inhibit the growth of S. oralis over time by acting as a bacteriostatic agent.
Review
Engineering, Biomedical
F. Melo-Fonseca, O. Carvalho, M. Gasik, G. Miranda, F. S. Silva
Summary: Significant advancements in research and technology have led to remarkable findings on the physiological dynamics of the human body. The transition from two-dimensional culture systems to three-dimensional dynamic cultures has allowed for a closer mimic of the complex physiological environment. This review focuses on mechanical stimulation devices and their potential for improvement to enhance mechanobiology studies.
BIO-DESIGN AND MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Nicole da Costa Cerqueira, Naasson Matheus Pereira Balica, Wenio Fhara Alencar Borges, Gabriel Melo Reis de Sousa, Denise Pupim, Polyana Alves Radi, Rubens Maribondo do Nascimento, Antonio Ramos Silva, Lucas Filipe Martins da Silva, Thercio Henrique de Carvalho Costa, Heurison de Sousa e Silva, Livio Cesar Cunha Nunes, Romulo Ribeiro Magalhaes de Sousa, Rafaela Luiz Pereira Santos
Summary: Surface treatment is a crucial technique for enhancing the adhesion between implants and bones, improving mechanical characteristics, and enhancing patient comfort. In this study, Ni-Cr alloys were examined and compared with thin films deposition using titanium nitride via plasma, cathodic cage, and hollow cathode methods for dental applications. The hollow cathode technique demonstrated better results due to the formation of a thicker film layer.
MATERIA-RIO DE JANEIRO
(2023)
Article
Optics
Zhi-Huan Pang, Meng Liu, Ai-Ping Luo, Yi Xu, Wen-Cheng Xu, Songnian Fu, Zhi-Chao Luo
Summary: We propose a novel mode-dependent gain equalizer using a few-mode chirped fiber Bragg grating (FM-CFBG) to effectively mitigate the mode-dependent gain in an all-fiber 2-mode EDFA. The equalizer based on FM-CFBG offers compact size, low insertion loss, and wavelength scalability, making it meaningful for long-haul MDM transmission.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yiwei Qiu, Chenliang Ding, Gangyao Zhan, Mengdi Luo, Jisen Wen, Mengbo Tang, Chun Cao, Wenjie Liu, Liang Xu, Bihu Lv, Dazhao Zhu, Cuifang Kuang, Xu Liu
Summary: This article proposes a novel method to simultaneously reduce the axial and lateral feature sizes of PPI-DLW. By employing a pseudo 3D hollow focus, a suspended nanowire with an isotropic 30-nm feature size was realized, thereby improving the capabilities of PPI-DLW for fabricating arbitrary 3D structures.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Manzhuo Wang, Jianbo Yue, Zhentao Yao, Tingyu Liu, Xiaoqiang Sun, Yuanda Wu, Daming Zhang
Summary: A silica waveguide 1×8 thermo-optic switch consisting of cascaded three-stage Mach-Zehnder interferometers (MZIs) is successfully demonstrated. The switch utilizes a multimode interference (MMI) coupler in the MMI-MZI 1×2 switch unit for its wavelength insensitivity and favorable fabrication tolerance. The switch design and optimization is based on the beam propagation method (BPM) and implemented using standard CMOS technologies. Experimental results show that the switch meets the requirements for insertion loss and crosstalk at 1550 nm wavelength, and also performs well in a wide wavelength range.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
H. M. de la Cruz, E. D. Hernandez-Campos, E. Ortiz-Ricardo, A. Martinez-Borquez, I. Rosas-Roman, V. Contreras, G. Ramos-Ortiz, B. Mendoza-Santoyo, Cecilia I. Zurita-Lopez, R. Castro-Beltran
Summary: Acoustic levitation is an important contactless manipulation technique in various fields. This study presents an affordable phased-array levitator that can stably trap micrometer dye-doped droplets in the air, enabling the creation of microlasers. The levitated microlasers exhibit comparable optical lasing features to On-a-Chip devices, with a maximum Q-factor of approximately 105 and a minimum lasing threshold of approximately 150 nJ cm-2.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yuqi Wang, Zilong Zhang, Suyi Zhao, Wei He, Xiaotian Li, Xin Wang, Yuchen Jie, Changming Zhao
Summary: This paper investigates the impact of localized defects in SLM devices on structured light generation and demonstrates the reconstructed light field results under different defect states using CGH loaded onto the DMD. The results show that central defects have minimal influence on the reconstructed light field, while edge defects have a significant impact. This study expands the application scenarios for the generation of structured light beams with SLM.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Ashraf A. A. Beshr, Hossam El-Din Fawzy, Ehab A. A. Eldin, Jong Wan Hu, Fathi A. Abdelmgeed
Summary: This paper introduces the application of digital measuring techniques, specifically Digital Close Range Photogrammetry (DCRP), in the detection of deformation in post-tensioned structural elements (PTSEs). The use of digital equipment and a terrestrial laser scanner (TLS) allows for highly accurate monitoring of PTSE camber, with deviations not exceeding 0.01 mm.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Shihao Gou, Danping Huang, Shipeng Liao, Fan Luo, Yang Yuan, Liang Liu, Xiaomei Wen
Summary: This paper proposes an online intelligent detection method for cable pitch defects in the field of optical cable manufacturing. The method utilizes a multi-sensor fusion image acquisition platform and deep learning technology to achieve accurate detection of pitch defects in optical cables.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Tun-Yao Hung, David W. U. Chan, Ching-Wei Peng, Chi-Wai Chow, Hon Ki Tsang
Summary: We present the first experimental demonstration of a high-capacity short-reach optical communication link which utilizes LSTM and DNN to achieve 300 Gbit/s 8-level pulse amplitude modulation (PAM8) generated by a single microring modulator. The experimental results show that 300 Gbit/s and 270 Gbit/s PAM8 modulation can be achieved at back-to-back and after 1 km transmission respectively.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Long Zhang, Li Pei, Jianshuai Wang, Jingjing Zheng, Kaihua Hu, Zhiqi Li, Tigang Ning, Jing Li, Li Zhong, Ruisi He
Summary: The amplification of long-haul mode division multiplexing (MDM) transmission systems is currently achieved through three steps, which can result in complexity and degraded transmission performance. To address this issue, this paper proposes an in-line few-mode erbium-doped fiber amplifier (FM-EDFA) based on cladding pumping, which enables simultaneous amplification and transmission in MDM systems. Experimental results demonstrate that the in-line FM-EDFA has excellent performance and shows great potential for practical long-haul transmission systems.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Chong Wang, Miaomiao Li, Jiahao Yang, Bingli Zhu, Jianghao Han, Wenbin Dang
Summary: This paper introduces the design of drive circuits using step recovery diodes and RF bipolar transistors to produce narrow pulse lasers, achieving the reduction of system size, power consumption and cost.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Ziqian Zhang, Liangyu Zhao, Chaorun Si, Yang Tian, Shilin Xu
Summary: A Hastelloy C276 coating was prepared on a martensitic stainless-steel substrate using laser melting deposition, resulting in a coating with high resistance to cavitation erosion. The coating exhibited a thick, progressively changing grain morphology from bottom to top, and the grains grew in a specific angle to the substrate plane. A compositional mixing zone was formed at the interface, forming a stable metallurgical bond. The coating showed a significantly improved hardness and enhanced resistance to cavitation erosion compared to the substrate.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Cui-Hong Li, Chao-Xiong He, Yuan-Yuan Ma, Jin-Chuan Wang, Ying Dong, Shao-Chong Zhu, Xiao-Wen Gao, Hui-Zhu Hu
Summary: In this paper, a non-contact optical measuring method for characterizing nanoparticles using optical tweezers is presented. The method relies on the optical polarization and scattering of nanoparticles, providing insights into both shape and size parameters. Experimental results show that the method can accurately measure the shape and size of nanoparticles, making it an effective tool for identifying and studying individual nanoparticles.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Magdalena Zieba, Cuma Tyszkiewicz, Katarzyna Wojtasik, Krystian Pavlov, Pawel Chaber, Ewa Gondek, Jacek Niziol, Roman Rogozinski, Pawel Kielan, Pawel Karasinski
Summary: This work presents a study on low-loss waveguide layers for planar evanescent wave sensor applications. Crack-free SiOx:TiOy composite layers with refractive indices of approximately 1.65 were fabricated using a sol-gel method and dip-coating technique. The fabricated layers exhibited good waveguide properties and optical homogeneity.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yali He, Jiao Tang, Zhongyang Li, Yaowu Hu
Summary: In this paper, a lithography-free broadband absorbing metasurface consisting of Ag nanoparticles with ultrafine nanogaps is demonstrated. The experimental results and numerical simulations show that the horizontally compressed Ag nanoparticles possess smaller nanogaps for high sensitivity, uniformity, and stability. The novel substrate also exhibits insensitivity to the incident or observation angle in an ambient environment and has promising practical applications.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Linqing Li, Chengwei Yang, Zhuo Wang, Kun Xiao, Rui Min
Summary: In this study, a stretchable polymer optical fiber with a sandwich structure was proposed for sleep monitoring. The fiber improved the pressure sensitivity of the mattress and enabled the measurement of respiratory rate, heart rate, and body motion information.
OPTICS AND LASER TECHNOLOGY
(2024)