Article
Chemistry, Physical
Kernius Vilkevicius, Algirdas Selskis, Evaldas Stankevicius
Summary: This study investigates the formation of gold nanostructures (nanobumps, nanocones, and nanojets) on the surface of metal using laser direct writing technique with different laser wavelengths. Experimental results show that shorter wavelength lasers provide a more precise and efficient fabrication process for controlling the properties of the nanostructures, making them highly suitable for practical applications.
APPLIED SURFACE SCIENCE
(2023)
Article
Optics
Antoine Delgoffe, Saood Nazir, Sargis Hakobyan, Clemens Honninger, Yves Bellouard
Summary: In this article, a method for manufacturing complex miniaturized free-space optical systems is presented, which combines contactless femtosecond laser-activated alignment with femtosecond laser 3D manufacturing. The fabricated device demonstrates self-starting mode-locking and stable train of solitons with high precision.
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
Chemistry, Analytical
Xiaochuan Ding, Yao Zhao, Ali Hassan, Yunlu Sun, Zhishan Hou, Wei Xue, Yu Cao
Summary: With the increase in information density, signal crosstalk and crossover pose challenges to the further development of chip integration and packaging density. This study proposes a novel waveguide structure, the photonic jumper wire, to overcome technical restrictions in waveguide crossing and parallel line wrapping, thereby enabling improved integration of photonic chips.
Article
Materials Science, Multidisciplinary
Rahul A. Rajan, Huang Tao, Weili Yu, Jianjun Yang
Summary: Femtosecond laser processing of lead halide perovskites has been widely studied for creating micro/nanostructures and improving light emitting properties. This study investigates the photoluminescence and lasing behaviors of single crystal and polycrystalline perovskites upon femtosecond laser ablation. Different regions show different carrier recombination mechanisms due to their defect chemistries and morphologies, enabling the realization of amplified spontaneous emission. The laser modified region in polycrystalline perovskites exhibits enhanced random lasing performance due to defect passivation and grain size reduction.
MATERIALS TODAY PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Hongshu You, Yachao Zhang, Yanlei Hu, Yuegan Song, Cheng Xue, Shengyun Ji, Rui Li, Longfu Li, Jiawen Li, Dong Wu, Jiaru Chu
Summary: This paper presents a facile method for constructing deformable Kirigami structures using femtosecond laser on shape memory polymer, showcasing simplicity, neglectable material loss, and independence from external mechanical force. The controlled deformation and programmable structure preparation provided by this method hold great promise for broad applications in mechanical metamaterials and bioinspired functional surfaces.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Engineering, Manufacturing
Wentao Tian, Zhiwen Wang, Chengjin Wang, Dongfeng Qi, Hongyu Zheng
Summary: This article investigates the effects and mechanisms of bubble behaviors on liquid-assisted femtosecond laser cutting of silicon wafers. It is found that the cavitation bubbles cause defocusing effects on subsequent pulses and the persistent bubbles lead to detrimental effects on surface morphology. Adjusting the time interval between pulses and using an ethanol solution can improve the cutting results.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Metallurgy & Metallurgical Engineering
Jaeho Park, Bo-In Park, Young Ju Son, Sun Hee Lee, Seung-Hoon Um, Yu-Chan Kim, Myoung-Ryul Ok, Jeong-Yun Sun, Hyung-Seop Han, Hojeong Jeon
Summary: The study proposes the use of femtosecond laser-mediated Mg surface patterning to enhance the binding strength of coating materials, ultimately reducing corrosion rates. Results show that the treated Mg exhibits lower corrosion rates and better biocompatibility compared to untreated Mg.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Optics
Tingyuan Wang, Yuyan Song, Chuqian Liu, Xiaolei Wang, Lie Lin, Weiwei Liu, Nan Zhang
Summary: In this study, near-infrared femtosecond laser was used to ablate a copper target in vacuum, producing nanoparticles collected on a silicon substrate. By applying an analytical thermodynamic model based on nanodroplets' evaporation, the generation dynamics and size distribution of the nanoparticles were successfully explained.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Cheng Xue, Yachao Zhang, Longfu Li, Yanlei Hu, Chao Chen, Yuegan Song, Hongshu You, Rui Li, Jiawen Li, Dong Wu, Jiaru Chu
Summary: This study presents a rapid, easy, and highly controllable fabrication strategy for achieving 3D multiscale hierarchical micro/nanofolds on a shape memory polymer surface. By utilizing laser ablation-induced gradient thickness film, the control of nanoparticle film thickness and the formation of multiscale structures are realized. The feature size of folds can be accurately regulated by adjusting laser scanning times and paths, and programmable laser cleaning technology can be used to achieve desired patterns on the micro/nanofolds.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Gabriele Bongiovanni, Pavel K. Olshin, Chengcheng Yan, Jonathan M. Voss, Marcel Drabbels, Ulrich J. Lorenz
Summary: This study used in situ electron microscopy to directly observe the femtosecond laser-induced fragmentation of gold nanoparticles in water, revealing that the process occurs through ejection of individual progeny particles. The fragmentation mechanism involves Coulomb fission and solution-mediated etching and growth processes, creating complex fragmentation patterns that rapidly fluctuate under prolonged irradiation. This study highlights the complexity of the interaction of plasmonic nanoparticles with ultrafast laser pulses and underlines the need for in situ observations to unravel the mechanisms of related phenomena.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Analytical
Yaoyao Li, Guangyu He, Hongliang Liu, Mingwei Wang
Summary: In this study, single-pulse and multi-pulse cumulative ablation experiments and drilling of CFRP were carried out using the characteristics of a femtosecond laser pulse, which can realize precision cold machining. By optimizing the experimental parameters, a cylindrical hole with HAZ < 10 μm, roundness > 0.95 and taper < 5 degrees was achieved. The research results confirm that ultrafast laser processing is a feasible and promising method for CFRP precision machining.
Article
Chemistry, Multidisciplinary
Mizue Mizoshiri, Kyohei Yoshidomi, Namsrai Darkhanbaatar, Evgenia M. Khairullina, Ilya I. Tumkin
Summary: The study demonstrates the direct writing of cobalt/cobalt oxide composites using femtosecond laser reductive sintering of Co3O4 nanoparticles on different substrates. The results show that polymer substrates affect the oxidation of the patterns, and this direct writing technique is promising for the application of catalysts and detectors in microsensors.
Article
Chemistry, Physical
Guanghua Cheng, Ling Lin, Konstantin Mishchik, Razvan Stoian
Summary: This study focuses on the properties of polarization-selective, light-guiding systems formed with subwavelength nanogratings induced by femtosecond laser pulses in bulk fused silica with type II refractive index traces. The polarization-dependent scattering on the optical guiding of type II waveguides is analyzed both through simulation and experiments, leading to the suggestion of potential optical designs combining type I guiding efficiency with type II anisotropies. A low-loss waveguide polarizer is demonstrated based on the modulation of the evanescent field emerging from type I waveguides using polarization-dependent scattering from neighboring nanogratings.
Article
Chemistry, Physical
Jiale Yong, Xue Bai, Qing Yang, Xun Hou, Feng Chen
Summary: A novel strategy for separating a polymer/water mixture using porous underwater superpolymphobic micro/nanostructures is proposed in this study. The use of femtosecond laser processing on a stainless steel mesh results in excellent repellence to liquid polymer droplets in water, achieving a high separation efficiency and flux for various polymer/water mixtures.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Shao-Feng Liu, Zheng-Wei Hou, Linhan Lin, Zhengcao Li, Hong-Bo Sun
Summary: 3D laser nanoprinting revolutionizes manufacturing by allowing maskless fabrication of 3D nanostructures at a resolution beyond the optical diffraction limit. It offers printed structures with unique physical, chemical, or mechanical properties not seen at the macro scale. However, its reliance on photopolymerization limits its usability to certain materials and functionalities. The ability to print diverse functional materials and the development of laser nanoprinting techniques beyond photopolymerization open up exciting new applications in nanophotonics and microelectronics.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Shun-Xin Li, Hong Xia, Tian-Yu Liu, He Zhu, Jia-Cheng Feng, Yang An, Xu-Lin Zhang, Hong-Bo Sun
Summary: Nanostructures offer a cost-effective method to enhance the light-trapping capability of optoelectronic devices. However, the instability of perovskite materials restricts the practical application of nanostructured optoelectronic devices. In this study, in situ encapsulated moire lattice perovskite photodetectors were fabricated using nanograting-structured soft templates with relative rotation angles. The moire lattice structure improved the light-harvesting ability of the perovskite crystal, resulting in enhanced device performance and long-term stability.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Shuo Zhao, Zheyu Li, Suyao Yin, Qi-dai Chen, Hong-bo Sun, Liping Wen, Lei Jiang, Kai Sun
Summary: Biomimetic materials that mimic competitive interactions in ecosystems offer a promising solution to address bacterial resistance. This study demonstrates the feasibility of using spiny particles to compete with bacteria for nutrients and inhibit their growth without inducing bacterial resistance. The material also shows good biocompatibility, making it a potential candidate for applications in reducing bacterial resistance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Guan-Yao Huang, Linhan Lin, Shuang Zhao, Wenbin Li, Xiaonan Deng, Simian Zhang, Chen Wang, Xiao-Ze Li, Yan Zhang, Hong -Hua Fang, Yixuan Zou, Peng Li, Benfeng Bai, Hong -Bo Sun, Tairan Fu
Summary: Excitons are quasi-particles composed of electron-hole pairs and play a crucial role in determining the optical properties of monolayer TMDs. Manipulating their charge states in a reversible manner remains challenging. By utilizing femtosecond-laser-driven atomic defect generation, electron transfer, and surface molecular desorption/adsorption, we have developed an all-optical approach to control the charge states of excitons in monolayer MoS2, enabling reconfigurable optical encoding.
Article
Chemistry, Multidisciplinary
Han-Wen Zhang, Yan-Gang Bi, Dong-Ming Shan, Zhi-Yu Chen, Yi-Fan Wang, Hong-Bo Sun, Jing Feng
Summary: Flexible perovskite solar cells (FPSCs) have attracted attention for their potential applications in next generation electronics, but the current transparent conductive electrodes (TCEs) hinder their flexible performance. In this study, a hybrid electrode (PUA/AgNWs/PH1000) consisting of a thin layer of silver nanowires (AgNWs) on a flexible substrate (PUA) modified with a conductive layer (PH1000) was proposed. This electrode showed high optical transmittance, electrical conductivity, and mechanical flexibility. When used in FPSCs, the ITO-free devices with the hybrid electrode exhibited desired flexibility and mechanical stability, retaining 77.4% of their initial power conversion efficiency after 10,000 bending cycles with a bending radius of 5 mm.
Article
Optics
Ze-Zheng LI, Yang Ouyang, Zhong-Tian LI, Zhen-Nan Tian, Xu-Lin Zhang, Qi-Dai Chen, Hong-Bo Sun
Summary: The implementation of a three-dimensional linear polarized LP11 mode converter using a femtosecond laser direct writing technique is a significant method to improve the capability of photonic circuits. The converter includes multi-mode waveguides, symmetric Y splitters, and phase delaying waveguides. The on-chip generation of LP11a and LP11b modes with relatively low insertion loss provides a foundation for high-order mode generation and mode conversion in 3D photonic circuits, playing a crucial role in mode coding and decoding.
Article
Chemistry, Physical
Lei Wang, Dan Wang, Yang Luo, Chen-Yu Xu, Lin Cui, Xian-Bin Li, Hong-Bo Sun
Summary: Electronic states are closely related to chemical compositions and play a crucial role in manipulating the properties of matter. In this study, the critical evolution stages of electronic states for monolayer WSe2 near the modification threshold were observed using broadband femtosecond transient absorption spectroscopy, confirming the intense femtosecond-laser-assisted oxygen-doping mechanism.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Ming-Yu Ma, Nian-Ke Chen, Dan Wang, Dong Han, Hong-Bo Sun, Shengbai Zhang, Xian-Bin Li
Summary: Using first-principles calculations, this study systematically investigates the properties of intrinsic defects and extrinsic dopants in monolayer AgI, revealing that Ag vacancy (VAg) and Be substitution on Ag site (BeAg) are the most promising p-type and n-type doping candidates, respectively, laying the foundation for the development of 2D electronic devices.
MATERIALS TODAY NANO
(2023)
Article
Chemistry, Multidisciplinary
Shu-Yu Liang, Yue-Feng Liu, Zhi-Kun Ji, Shen-Yuan Wang, Hong Xia, Hong-Bo Sun
Summary: Researchers have developed a femtosecond laser-induced forward transfer (FsLIFT) technology for programmable fabrication of high-resolution full-color perovskite quantum dot (PQD) arrays and arbitrary micropatterns. This technology does not require chemical reagent treatment or mask contact, ensuring the preservation of the photophysical properties of PQDs. The high-resolution PQD array achieved using FsLIFT can facilitate the development of diverse practical applications based on patterned PQDs.
Article
Chemistry, Multidisciplinary
Xiao-Jie Wang, Shuang Zhao, Hong-Hua Fang, Renhao Xing, Yuan Chai, Xiao-Ze Li, Yun-Ke Zhou, Yan Zhang, Guan-Yao Huang, Cong Hu, Hong-Bo Sun
Summary: Laser-induced quantum emitters in aluminum nitride demonstrate robust emission with strong zero phonon line, narrow line width, and weak phonon side bands. These results illustrate the potential of laser writing to create high-quality quantum emitters for quantum technologies and provide further insight into laser writing defects in relevant materials.
Article
Chemistry, Multidisciplinary
Jian-Guan Hua, Hang Ren, Jiatai Huang, Mei-Ling Luan, Qi-Dai Chen, Saulius Juodkazis, Hong-Bo Sun
Summary: Femtosecond lasers enable flexible and thermal-damage-free ablation of solid materials, but true 3D nano-sculpturing has not been achieved due to technical challenges. This article proposes a new technique using cavitation dynamics and backside ablation to achieve stable material removal for precise 3D fabrication. With this technique, 3D devices with surface roughness less than 10 nm can be produced, enabling novel structural and functional micro-nano optics and non-silicon micro-electro-mechanical systems.
Article
Optics
Ze-Zheng Li, Zhen-Nan Tian, Zhong-Tian Li, Yang Ouyang, Qi-Dai Chen, Hong-Bo Sun
Summary: The composite waveguide method is proposed to increase the range of photon propagation constant beta, which significantly expands the variation range of beta. With this method, the researchers successfully constructed the most compact FsLDW directional couplers and achieved the reconstruction of the Hamiltonian of a Hermitian array. This study represents a further step towards fine control of waveguide coupling and compact integration of FsLDW photonic integrated circuits.
PHOTONICS RESEARCH
(2023)
Article
Optics
Xue-Peng Pan, C. A. Sun, Shan-Ren Liu, B. O. Wang, Meng-Meng Gao, Q. Guo, Qi-Dai Chen, Hong-Bo Sun, Yong-Sen Yu
Summary: This paper proposes and demonstrates a novel high-sensitivity temperature sensor based on a chirped thin-core fiber Bragg grating Fabry-Perot interferometer (CTFBG-FPI) and the Vernier effect. Two CTFBG-FPIs with different interferometric cavity lengths are inscribed inside a thin-core fiber using femtosecond laser direct writing technology to form a Vernier effect system. The measured temperature sensitivity of this sensor is -1.084 nm/degrees C in a range of 40-90 degrees C. This sensor is expected to play a crucial role in precision temperature measurement applications.
Article
Chemistry, Physical
Monan Liu, Qing Wang, Ai-Wu Li, Hong-Bo Sun
Summary: This article summarizes recent research and proposes an all-light solution using graphene-oxide-based soft robots. The study demonstrates that lasers can precisely define actuators to form joints and facilitate efficient energy storage and release, enabling complex motion control.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Optics
Dong-Dong Han, Yong -Lai Zhang, Zhao-Di Chen, Ji-Chao Li, Jia-Nan Ma, Jiang -Wei Mao, Hao Zhou, Hong -Bo Sun
Summary: This article reports a moisture responsive shape-morphing slippery surface that enables simultaneous moisture responsive shape-morphing and oil-lubricated water repellency. It is prepared by creating biomimetic microstructures on graphene oxide membrane and subsequent lubricating with a thin layer of oil on the laser structured reduced GO surface. The integration of this surface with an LRGO/GO bilayer actuator enables droplet sliding ability and enhanced moisture deformation performance, demonstrating versatility for active/passive trapping, droplet manipulation, and sensing.
OPTO-ELECTRONIC ADVANCES
(2023)
