Editorial Material
Optics
Chaobo Chen, Leonid V. Zhigilei
Summary: Ultrafast pump-probe microscopy has provided new insights into the complex dynamics of laser-induced explosive phase transformations and highlighted the importance of close integration of experimental, computational, and theoretical efforts.
LIGHT-SCIENCE & APPLICATIONS
(2022)
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
Kouhei Kishimoto, Hiroto Kuroda, Misaki Tsubota, Kei Yamashita, Jin Wang, Kenji Sakai, Mohd Mawardi Saari, Toshihiko Kiwa
Summary: Magnetic nanoparticles (MNPs) are commonly used in medical applications, particularly in magnetic immunoassay (MIA) for pathological diagnosis. This study proposes a nonthermal dispersion method for MNPs using femtosecond pulse laser irradiation. The dispersion of MNPs was evaluated by measuring the change in magnetic signals. Results show that femtosecond pulse laser irradiation is a suitable method for dispersion of MNPs in MIA systems.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Julia Brand, Ksenia Maximova, Steve Madden, Alison Wain, Andrei V. Rode, Ludovic Rapp
Summary: In this study, we investigated the use of femtosecond pulse lasers for cleaning Makrana marble used in construction. We found that green irradiation was the most efficient, and infrared radiation allowed for safe removal of contaminants. The study demonstrates the potential of femtosecond lasers for safe and effective marble cleaning.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Raja Azhar Ashraaf Khan, A. M. Alsaad, Afsheen Zulfqar, Muhammad Mateen, Qais M. Al Bataineh, Bader S. Al-Anzi, Hisham S. M. Abd-Rabboh, Ghulam Abbas Ashraf, Ahmad Telfah, Meng-Bo Luo
Summary: The impact of the interaction strength between polymer and nanoparticles on the glass transition temperature and phase separation in polymer nanocomposites was explored using molecular dynamics simulations. The results showed that the glass transition temperature exhibited different behaviors at low and high-volume fractions of nanoparticles, depending on the interaction strength. Phase separation was observed at high volume fractions of nanoparticles with low interaction strength, while no phase separation was observed at high interaction strengths. It is recommended to consider the critical value of the interaction strength to avoid phase separation and instability in polymer nanocomposites with a high volume fraction of nanoparticles.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Optics
Chen Xie, Remi Meyer, Luc Froehly, Remo Giust, Francois Courvoisier
Summary: Ultrafast imaging techniques are crucial in physics and chemistry, but the lack of characterization of weak probe beams hinders progress towards high spatial resolution. A pump-induced micro-grating generated from the electronic Kerr effect can provide a detailed in-situ characterization of weak probe pulses, solving issues such as absolute pump-probe delay determination and pulse-front tilt detection. This non-destructive and fast probe diagnostic technique is applicable to all wavelengths and polarizations, enabling previously inaccessible spatiotemporal imaging in various fields of ultrafast science.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Optics
Bingxin Yan, Dongwei Li, Lanzhi Zhang, Tingting Xi, Yangjian Cai, Zuoqiang Hao
Summary: In this article, we experimentally investigate the performance of filamentation of femtosecond vortex laser pulses in turbulent air. We evaluate the pointing stability, longitudinal wandering, intensity, and spectral broadening by comparing them with femtosecond Gaussian laser pulses. The results show that femtosecond vortex pulses are less affected by air turbulence compared to Gaussian pulses, making them more stable for long-distance applications in the atmosphere.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Benhai Wang, Haobin Han, Lijun Yu, Yueyue Wang, Chaoqing Dai
Summary: In this article, we report an ultrashort pulse fiber laser based on VSe2/GO nanocomposite and verify the formation process of soliton and soliton molecules by numerical simulation. We reveal the nonlinear stages in soliton dynamics and demonstrate the promising saturable absorber characteristics of VSe2/GO.
Article
Nanoscience & Nanotechnology
Feifei Wang, Lan Jiang, Changji Pan, Zhipeng Wang, Yiling Lian, Qingsong Wang, Wenpan Tao, Jingya Sun
Summary: Holograms hidden inside transparent materials are important for information encryption storage. By using double-pulse femtosecond laser processing, holograms can achieve improved imaging quality, and the effect and mechanism of self-trapped excitons (STEs) on the ablation have been systematically studied.
Article
Engineering, Environmental
Shengcun Ma, Sidney Poon, Ashok Mulchandani, David Jassby
Summary: Understanding the behavior of heavy metals in wastewater is crucial for the development of metal removal and detection techniques. In this study, the dynamic and evolving size and partitioning behavior of lead, cadmium, and arsenite throughout the wastewater treatment train were characterized. Cd and As(III) were found to be highly mobile, while Pb was primarily in complex forms or adsorbed onto inorganic particulates. An increase in water hardness slightly increased metals in the dissolved fraction.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Qing Wu, Si Chen, Wenli Bao, Haibin Wu
Summary: This study reports the application of saturable absorbers prepared from graphdiyne-modified tapered fibers to an erbium-doped fiber laser for achieving femtosecond pulse output. Graphdiyne quantum dots were successfully prepared using the Glaser-Hay method. The graphdiyne-based all-fiber saturable absorber device exhibited strong saturable absorption characteristics and successfully generated femtosecond pulses. This work lays the foundation for the application of the nonlinear optical material, graphdiyne, in ultrafast photonics.
Article
Polymer Science
Kay Bischoff, Dominik Muecke, Gian-Luca Roth, Cemal Esen, Ralf Hellmann
Summary: In this study, we report on the laser ablation of cyclic olefin copolymer using an amplified ultrashort pulsed laser in the ultraviolet spectral range. The results demonstrate high ablation depth, excellent surface roughness, and increasing ablation efficiencies with increasing fluence. Comparing with an infrared laser wavelength, UV ablation shows significant advantages in terms of ablation efficiency, surface roughness, and quality. This study provides an efficient and qualitative tool for the laser machining of cyclic olefin copolymer using high-power UV ultrashort pulsed lasers.
Article
Optics
Leonidas Agiotis, Michel Meunier
Summary: In this study, the threshold power for self-focusing in gold nanorod colloids of varying concentration was evaluated using a power limiting method in the femtosecond filamentation regime. It was found that tuning the pulses near the longitudinal plasmon peak of the nanorods leads to saturation of linear absorption and reshaping of the particles. Numerical simulations revealed a subtle, monotonically increasing enhancement of the nonlinear refractive index of the host material (water) as the nanoparticles concentration increases.
Article
Multidisciplinary Sciences
Liang Yang, Hongrong Hu, Alexander Scholz, Florian Feist, Gabriel Cadilha Marques, Steven Kraus, Niklas Maximilian Bojanowski, Eva Blasco, Christopher Barner-Kowollik, Jasmin Aghassi-Hagmann, Martin Wegener
Summary: The authors propose laser printing as a facile process for fabricating printed electronics with minimum feature sizes below 1μm and demonstrate functional diodes, memristors, and physically unclonable functions. Laser printing with different inks, for the semiconductor ZnO and the metals Pt and Ag, is introduced for fabricating printed functional electronic devices with minimum feature sizes below 1μm. The versatility of this approach is demonstrated by showing functional diodes, memristors, and a physically unclonable function.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Jianwu Guo, Pengfei Ji, Lan Jiang, Gen Lin, Yu Meng
Summary: This study investigates the sintering process of Al nanoparticles under femtosecond laser irradiation using a multiscale approach. The temporal evolutions of various parameters are calculated to reveal the detailed spatiotemporal information, and the impacts of laser fluence and pulse width on the sintering process are studied.