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Book Ultrashort Pulse Laser Ablation of Bulk Materials Using Shaped Laser Beams

Download or read book Ultrashort Pulse Laser Ablation of Bulk Materials Using Shaped Laser Beams written by Dmitriy Mikhaylov and published by Cuvillier Verlag. This book was released on 2021-06-24 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: High precision, high quality, and high throughput of ultrashort pulse laser ablation of bulk material are the most demanded properties that are required to let this process technology compete with other micro-machining techniques. Previous attempts to increase volumetric ablation rates of ultrashort pulse laser processes were based on the increase of fluence or pulse repetition rates. They run into limitations mainly set by the occurrence of bumpy surfaces due to overheating of bulk material. In this work, the potential of laser beam shaping for the enhancement of ablation rates is studied systematically for the first time. The question regarding the physically shortest possible process time for ablation of 2.5D-structures by means of an ultrashort pulse laser is answered using a heat conduction model, which is extended by the ability to consider spatially shaped beams. The strategy of laser beam stamping is implemented in a novel optical setup and proven both theoretically and experimentally to have a great potential for increasing ablation rates.

Book Pulsed Laser Processing of Materials

Download or read book Pulsed Laser Processing of Materials written by Dongfang Yang and published by BoD – Books on Demand. This book was released on 2024-07-17 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: The processing and analyzing of materials by short laser pulses demonstrates a significant scientific, technological, and industrial potential that has been revealed largely over the last decade. This book presents seven chapters of literature reviews written by experts from the international scientific community. It covers recent advances in laser ablation technologies for producing Li-ion battery materials and components; pulsed laser deposition of ferroelectric materials; fundamentals of ultra-short pulse laser interaction with metals, semiconductors, or dielectrics; synthesis of nanoparticles in liquid of a variety of materials by laser ablation; processing of biological tissues and materials by ultrashort-pulse burst-mode laser; gemstone identification using laser-induced Raman spectroscopy, photoluminescence, and photoluminescence lifetime analysis and machine learning for reliable quantitative elemental analysis of materials from LIBS spectral data.

Book Encyclopedia of Interfacial Chemistry

Download or read book Encyclopedia of Interfacial Chemistry written by and published by Elsevier. This book was released on 2018-03-29 with total page 5276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encyclopedia of Interfacial Chemistry: Surface Science and Electrochemistry, Seven Volume Set summarizes current, fundamental knowledge of interfacial chemistry, bringing readers the latest developments in the field. As the chemical and physical properties and processes at solid and liquid interfaces are the scientific basis of so many technologies which enhance our lives and create new opportunities, its important to highlight how these technologies enable the design and optimization of functional materials for heterogeneous and electro-catalysts in food production, pollution control, energy conversion and storage, medical applications requiring biocompatibility, drug delivery, and more. This book provides an interdisciplinary view that lies at the intersection of these fields. Presents fundamental knowledge of interfacial chemistry, surface science and electrochemistry and provides cutting-edge research from academics and practitioners across various fields and global regions

Book Micro Manufacturing

Download or read book Micro Manufacturing written by Muammer Koç and published by John Wiley & Sons. This book was released on 2011-05-06 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first of its kind to collectively address design-based and mechanical micro-manufacturing topics in one place. It focuses on design and materials selection, as well as the manufacturing of micro-products using mechanical-based micro-manufacturing process technologies. After addressing the fundamentals and non-metallic-based micro-manufacturing processes in the semiconductor industry, it goes on to address specific metallic-based micro-manufacturing processes, such as: micro-forming, micro-machining, micro-molding, micro-laser processing, micro-layered manufacturing, micro-joining, micro-assembly and materials handling, and microEDM and ECM. The book provides an in-depth understanding of materials behavior at micro-scales and under different micro-scale processing conditions, while also including a wide variety of emerging micro-scale manufacturing issues and examples.

Book Dynamics of Ultra short Laser Pulse Interaction with Solids at the Origin of Nanoscale Surface Modification

Download or read book Dynamics of Ultra short Laser Pulse Interaction with Solids at the Origin of Nanoscale Surface Modification written by Florenţa Adriana Costache and published by . This book was released on 2007 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Comprehensive Model for Energy Transport and Ablation of Metal Films Induced by Ultrashort Pulsed Lasers

Download or read book A Comprehensive Model for Energy Transport and Ablation of Metal Films Induced by Ultrashort Pulsed Lasers written by Yunpeng Ren and published by . This book was released on 2012 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive laser material ablation model was developed to describe energy transport, ultrafast phase changes, and material ablation of metal films irradiated by ultrashort laser pulses. The two optical models were incorporated into the TTM to simulate laser energy deposition and the resulting thermal response, ultrafast phase changes from solid to liquid and from liquid to vapor, and phase explosion of metal films irradiated by ultrashort laser pulses. It was found that dynamic optical properties could play a very important role in modeling ultrashort-pulsed laser interactions with metal materials. In the semi-classical TTM, due to the effect of electron drifting, slightly lower electron and lattice temperatures were obtained compared to those calculated by the classical TTM under the same laser irradiation conditions. Higher laser fluence and longer pulse duration could result in more distinct difference between the two models. For multi-pulse irradiations, the results showed that with the same total energy in a laser burst, more pulses with a shorter separation time, e.g., 1 ps, or fewer pulses with a longer separation time, e.g., 100 ps, could achieve higher lattice temperature. Results of laser material ablations show that for high laser fluences phase explosion is a dominating mechanism in material ablation. The simulated ablation depths correlated very well with existing experimental data over a broad range of fluences, 0.6 - 30 J/cm2.

Book Micro and Nano Structuring of Materials Via Ultrashort Pulsed Laser Ablation

Download or read book Micro and Nano Structuring of Materials Via Ultrashort Pulsed Laser Ablation written by Chung-Wei Cheng and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser material processing has been demonstrated as an effective means for machining almost every solid material. The quality of laser machining depends on the processing parameters that dictate material ablation mechanisms. The understanding of the complex physics associated with ultrashort pulsed laser (USPL) material interaction and ablation has advanced significantly owing to a great many theoretical and experimental studies in the past 20 years. To date, USPLs have been considered as a novel tool for micro- and nano-machining of bulk or thin film materials and for internal modification of transparent materials via multi-photon absorption in a tiny focal volume. Moreover, USPL material processing is now gaining interest in other applications, such as in sensors, electronics and medical device industries.

Book Ultra short Pulsed Laser Surface Processing and Decontamination

Download or read book Ultra short Pulsed Laser Surface Processing and Decontamination written by Xiaoliang Wang and published by . This book was released on 2008 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis surface decontamination via USP (ultra-short pulse) laser ablation is experimentally investigated. A Raydiance laser(0.9 or 1.2 ps, 1552nm, 1-5[mu]J, 1-500kHz) is employed. By focusing the high peak intensity, ultra-short pulse laser beam into a small spot and scanned over the contaminated area, material removal via plasma-mediated ablation is implemented with micro-joule level pulses. Laser ablation features of different materials such as glass, PDMS polymer and blood contamination are studied. By targeting a thin film or distributed surface contaminants with the USP laser decontamination results at varies laser parameters are examined. By carefully aligning the laser focus removal at cellular level is demonstrated. Utilizing the advantages of USP laser, we successfully achieved optimum surface decontamination results on soft biological phantom and skin dermis tissue. The experiment results are evaluated by a digital microscope or SEM. The Ultra-short pulse laser ablation technique offers a promising alternative to the current surface processing and decontamination method in bio-medical applications.

Book Optically Induced Nanostructures

Download or read book Optically Induced Nanostructures written by Karsten König and published by Walter de Gruyter GmbH & Co KG. This book was released on 2015-05-19 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructuring of materials is a task at the heart of many modern disciplines in mechanical engineering, as well as optics, electronics, and the life sciences. This book includes an introduction to the relevant nonlinear optical processes associated with very short laser pulses for the generation of structures far below the classical optical diffraction limit of about 200 nanometers as well as coverage of state-of-the-art technical and biomedical applications. These applications include silicon and glass wafer processing, production of nanowires, laser transfection and cell reprogramming, optical cleaning, surface treatments of implants, nanowires, 3D nanoprinting, STED lithography, friction modification, and integrated optics. The book highlights also the use of modern femtosecond laser microscopes and nanoscopes as novel nanoprocessing tools.

Book Laser Induced Breakdown Spectroscopy

Download or read book Laser Induced Breakdown Spectroscopy written by Jagdish P. Singh and published by Elsevier. This book was released on 2007-10-03 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser induced breakdown spectroscopy (LIBS) is basically an emission spectroscopy technique where atoms and ions are primarily formed in their excited states as a result of interaction between a tightly focused laser beam and the material sample. The interaction between matter and high-density photons generates a plasma plume, which evolves with time and may eventually acquire thermodynamic equilibrium. One of the important features of this technique is that it does not require any sample preparation, unlike conventional spectroscopic analytical techniques. Samples in the form of solids, liquids, gels, gases, plasmas and biological materials (like teeth, leaf or blood) can be studied with almost equal ease. LIBS has rapidly developed into a major analytical technology with the capability of detecting all chemical elements in a sample, of real- time response, and of close-contact or stand-off analysis of targets. The present book has been written by active specialists in this field, it includes the basic principles, the latest developments in instrumentation and the applications of LIBS . It will be useful to analytical chemists and spectroscopists as an important source of information and also to graduate students and researchers engaged in the fields of combustion, environmental science, and planetary and space exploration.* Recent research work* Possible future applications* LIBS Principles

Book Handbook of Laser Micro and Nano Engineering

Download or read book Handbook of Laser Micro and Nano Engineering written by KOJI SUGIOKA. and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook provides a comprehensive review of the entire field of laser micro and nano processing, including not only a detailed introduction to individual laser processing techniques but also the fundamentals of laser-matter interaction and lasers, optics, equipment, diagnostics, as well as monitoring and measurement techniques for laser processing. Consisting of 11 sections, each composed of 4 to 6 chapters written by leading experts in the relevant field. Each main part of the handbook is supervised by its own part editor(s) so that high-quality content as well as completeness are assured. The book provides essential scientific and technical information to researchers and engineers already working in the field as well as students and young scientists planning to work in the area in the future. Lasers found application in materials processing practically since their invention in 1960, and are currently used widely in manufacturing. The main driving force behind this fact is that the lasers can provide unique solutions in material processing with high quality, high efficiency, high flexibility, high resolution, versatility and low environmental load. Macro-processing based on thermal process using infrared lasers such as CO2 lasers has been the mainstream in the early stages, while research and development of micro- and nano-processing are becoming increasingly more active as short wavelength and/or short pulse width lasers have been developed. In particular, recent advances in ultrafast lasers have opened up a new avenue to laser material processing due to the capabilities of ultrahigh precision micro- and nanofabrication of diverse materials. This handbook is the first book covering the basics, the state-of-the-art and important applications of the dynamic and rapidly expanding discipline of laser micro- and nanoengineering. This comprehensive source makes readers familiar with a broad spectrum of approaches to solve all relevant problems in science and technology. This handbook is the ultimate desk reference for all people working in the field.

Book Simulation of Material Removal Efficiency with Ultrashort Laser Pulses

Download or read book Simulation of Material Removal Efficiency with Ultrashort Laser Pulses written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding physical processes accompanying ablation is necessary for optimal use of ultrashort laser pulse (USLP) material processing. We describe the implementation of self-consistent electromagnetic propagation -energy absorption in our numerical models and estimate effect on material removal of energy, pulselength and prepulses.