Ultrafast dynamics observation during femtosecond laser ...- ultrafast laser processing of materials a review ,4D ultrafast scanning electron microscopy, femtosecond laser manufacturing (Some figures may appear in colour only in the online journal) 1. Introduction Ultrafast lasers can change the states and properties of materials through interactions with them, and they can be used to control the processing of materials from the micro- Ultrafast laser processing of materials: a review | Advances ...Find 500+ million publication pages, 20+ million researchers, and 900k+ projects. onAcademic is where you discover scientific knowledge and share your research.
DOI: 10.1016/j.jmapro.2022.06.064 Corpus ID: 250649811; Ultrafast pulsed laser stealth dicing of 4H-SiC wafer: Structure evolution and defect generation @article{Wang2022UltrafastPL, title={Ultrafast pulsed laser stealth dicing of 4H-SiC wafer: Structure evolution and defect generation}, author={Lingfeng Wang and C. Zhang and Feng Liu and Huai Zheng and Gary J. Cheng}, journal={Journal of ...
Ultrafast all-optical switches based on epsilon-near-zero (ENZ)-enhanced nonlinear refraction in transparent conducting oxides have achieved exciting results in realizing large absolute modulations. However, broad-band, polarization-independent, and wide-angle ultrafast all-optical switches have been challenging to produce, due to the inherent narrow band, polarization-dependent, and angle ...
Ultrafast laser processing of materials: a review. We present an overview of the different processes that can result from focusing an ultrafast laser light in the femtosecond–nanosecond time regime on a host of materials, e.g., metals, semiconductors, and insulators. We summarize the physical processes and surface and bulk applications and highlight how femtosecond lasers can be used to process various materials.
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A review of recent progress in the use of infrared femtosecond lasers to fabricate optical fiber sensors that incorporate fiber Bragg gratings (FBG) and random fiber gratings (RFG) is presented. The important advancements in femtosecond laser writing based on the phase mask technique now allow through-the-coating (TTC) fabrication of Bragg gratings in ultra-thin fiber filaments, tilted fiber ...
Abstract and Figures. The unique characteristics of ultrafast lasers, such as picosecond and femtosecond lasers, have opened up new avenues in materials processing that employ ultrashort pulse ...
Abstract. Surface functionalization of metallic micro-nanoscale system is an emerging strategy for the realization of multifunctional materials. As a facile one-step process, ultrafast laser micromachining has emerged in recent years as a new technique for micro-nanostructure fabrication. In the past, lots of investigations on ultrafast laser ...
Ultrafast Laser Processing of Materials. Activities-challenges: Bio-inspired surface modification and functionalization of solid surfaces via ultrashort laser pulses in various types of materials (i.e. semiconductors, metals, dielectrics, polymers), investigation of surface micro/nano structure role on wetting, optical, and tribological ...
Yoshitomi, H. Takada, K. Torizuka, and Y. Kobayashi, “100-W average-power femtosecond fiber laser system with variable parameters for rapid optimization of laser processing,” in Conference on Lasers and Electro-Optics OSA Technical Digest, San Jose, CA, 5–10 May 2019 (Optical Society of America, Washington, DC, 2019), paper SM3L.2.
Ab Initio Simulation of Electrical Currents Induced by Ultrafast Laser Excitation of Dielectric Materials Georg Wachter, Christoph Lemell, Joachim Burgdörfer, Shunsuke A. Sato, Xiao-Min Tong, and Kazuhiro Yabana Phys. Rev. Lett. 113, 087401 – Published 18 August 2014
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Ultrafast lasers have become essential tools for ad-vanced micro-machining and materials processing. When delivered properly to the target, the extreme brevity of the pulses facilitates material removal without imposing ther-mal effects on the remaining structure. We describe herein a new ultrafast laser platform (Smart Light™) based on
There have been several review articles available on the topic of ultrafast laser processing 27, 37, 38 , ultrafast laser micromachining of transparent materials 28,[39][40][41] , laser cutting of ...
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Ultrafast laser ablation is a composite physical process that depends on the laser parameters and the properties of the target. Regarding metal targets, the dynamic process of ultrafast laser ablation of aluminum with an energy fluence considerably higher than the ablation threshold was investigated in [ 46 ].
The Yb3+ ion has a very simple energy level scheme, which consists of only two manifolds participating in the lasing process. The laser operation wavelength is in the 1 µm region, similar to the Nd3+ ion. Yb-doped laser materials can be pumped by strained layer InGaAs diode lasers in the wavelength range between 0.9 µm and 1.1 µm.
In the experimental part of our review, it was revealed that ultrashort intense laser pulses provide a unique technique for precise diamond micromachining, mainly due to high electric field strengths capable of inducing nonlinear absorption in transparent wide band gap materials as diamond, due to minimized thermal effects and due to short processing times.
A brief review is given regarding ultrafast laser micromachining of materials. Some general experimental observations are first provided to show the characteristics of ultrafast laser micromachining. Apart from empirical research, mathematical models also appear to allow for a further and systematic understanding of these phenomena.
Razvan Stoian graduated in 1996 from the Bucharest University, Romania, and received his doctoral degree in 2000 from the Free University, Berlin, Germany. He was with the Ultrafast Laser Material-Processing Group at the Max-Born Institute, Berlin between 1997 and 2004, and joined the Centre Nationale de la Recherche Scientifique France in 2004 where he is now Research Director.
This review summarizes the recent progress in the study of ultrafast nonthermal effects of light on magnetic materials. It is demonstrated that due to opto-magnetic phenomena an intense 100 fs circularly polarized laser pulse acts on the spins similar to an equivalently short effective magnetic field pulse up to 1 T.
Qiao develops ultrafast laser systems and methods that can be used to fabricate integrated photonic circuits and advanced optical components. While at Bordeaux, she will collaboratively research ultrafast lasers material processing in the gigahertz regime, which uses extremely short pulses of light for non-contact material removal.
Course Title Ultrafast Laser Materials Processing: Students are expected to learn some basics of laser, non-linear optics, ultrafast lasers, ultrafast laser materials processing, and hands on experience on how an ultrafast laser works, laser safety and how to characterize it and use it to modify materials. Credit hours: 3
adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A
The results, which the team has just published in Physical Review Research, pave the way for versatile applications that rely on our understanding of ultrafast surface dynamics. Examples are the laser processing of material surfaces to create tailor-made nanoscale structures or the realization of compact laser-based particle or radiation sources.
