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This book contains the scientific contributions to the Special Issue entitled: "New Trends and Applications in Femtosecond Laser Micromachining". It covers an array of subjects, from the basics of femtosecond laser micromachining to specific applications in a broad spectra of fields such biology, photonics and medicine.

Research & information: general --- Physics --- Optical physics --- ultrafast laser microfabrication --- microfluidic --- glass bonding --- ultrashort laser pulses --- heat accumulation --- transparent materials --- quartz --- stealth dicing --- femtosecond --- fused silica --- double pulses --- selective chemical etching --- cell elasticity --- endothelial cells --- optical micromanipulation --- holographic optical tweezers --- two-photon polymerization --- image processing --- micromodels --- porous media --- 3D multi-depth channels --- laser machining --- femtosecond laser micromachining --- femtosecond laser material processing --- micro/nanotechnology fabrication --- atomic force microscope --- laser ablation diameter --- separation distance (SW) --- sub-micron bridges --- YBCO thin film --- photonic quantum chip --- femtosecond laser direct writing --- Hadamard gate --- CNOT gate --- path-encoded Bell state --- femtosecond laser --- fs-assisted cataract surgery --- laser-assisted ophthalmic surgery --- high pulse frequency --- low energy --- roughness analysis --- thermal annealing --- integrated optics --- glass micromachining --- 3D structuring --- n/a

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• Reference Manager
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This book contains the scientific contributions to the Special Issue entitled: "New Trends and Applications in Femtosecond Laser Micromachining". It covers an array of subjects, from the basics of femtosecond laser micromachining to specific applications in a broad spectra of fields such biology, photonics and medicine.

ultrafast laser microfabrication --- microfluidic --- glass bonding --- ultrashort laser pulses --- heat accumulation --- transparent materials --- quartz --- stealth dicing --- femtosecond --- fused silica --- double pulses --- selective chemical etching --- cell elasticity --- endothelial cells --- optical micromanipulation --- holographic optical tweezers --- two-photon polymerization --- image processing --- micromodels --- porous media --- 3D multi-depth channels --- laser machining --- femtosecond laser micromachining --- femtosecond laser material processing --- micro/nanotechnology fabrication --- atomic force microscope --- laser ablation diameter --- separation distance (SW) --- sub-micron bridges --- YBCO thin film --- photonic quantum chip --- femtosecond laser direct writing --- Hadamard gate --- CNOT gate --- path-encoded Bell state --- femtosecond laser --- fs-assisted cataract surgery --- laser-assisted ophthalmic surgery --- high pulse frequency --- low energy --- roughness analysis --- thermal annealing --- integrated optics --- glass micromachining --- 3D structuring --- n/a

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Following a previous topic (Scientific advances in STEM: from professors to students; https://www.mdpi.com/topics/advances_stem), this new topic aims to highlight the importance of establishing collaborations among research groups from different disciplines, combining the scientific knowledge from basic to applied research as well as taking advantage of different research facilities. Fundamental science helps us to understand phenomenological basics, while applied science focuses on products and technology developments, highlighting the need to perform a transference of knowledge to society and the industrial sector.

Technology: general issues --- History of engineering & technology --- porous dental implant --- fatigue resistance --- cellular behavior --- surface roughness --- chemicaletching --- bioglass coating --- porous titanium --- femtosecond laser --- surface modification --- instrumented micro-indentation --- scratch test --- wettability --- cell culture --- electrical impedance --- osseointegration --- bimodal microstructure --- hot-pressing --- powder metallurgy --- mechanicalmilling --- mechanical behavior --- biofilms --- gelatin --- nanoparticles --- iron oxide --- antioxidant activity --- antibacterial activity --- electrospinning --- cellulose acetate --- ethylcellulose --- nanostructures --- rheological properties --- thermal properties --- microstructure --- bioplastics --- rice bran --- rice bran oil --- valorization --- starch --- injection molding --- Rugulopteryx okamurae --- DMA --- seaweed --- : cost function --- controlled release --- Arrabidae chica Verlot --- chitosan/alginate membranes

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Laser shock processing (LSP) is a continuously developing effective technology used to improve surface and mechanical properties for metallic alloys. LSP is in direct competition with other established technologies, such as shot peening, both in preventive manufacturing treatments and maintenance/repair operations. The level of LSP maturity has increased in recent years and several thematic international conferences have been organized (i.e., the 7th ICLPRP held in Singapore, June 17–22, 2018) to discuss different developments of a number of key aspects. These aspects include: fundamental laser interaction phenomena; material behavior at high deformation rates/under intense shock waves; laser sources and experimental process implementation; induced microstructural/surface/stress effects; mechanical and surface properties with experimental characterization and testing; numerical process simulation; development and validation of applications; comparison of LSP to competing technologies; and novel related processes. All of these aspects have been recursively treated by well-renowned specialists, providing a firm basis for the further development of the technology in its path to industrial penetration. However, the application of LSP (and related technologies) on different types of materials with different applications (such as the always demanding aeronautical/aerospatial field or the energy generation, automotive, and biomedical fields) still requires extensive effort to elucidate and master different critical aspects. Thus, LSP deserves a great research effort as a necessary step prior to its industrial readiness level. The present Special Issue of Metals in the field of “Laser Shock Processing and Related Phenomena” aims, from its initial launching date, to collect (especially for the use of LSP application developers in different target sectors) a number of high-quality and relevant papers representing state-of-the-art technology that is useful to newcomers in realizing its wide and relevant prospects as a key manufacturing technology. Consequently, in an additional and complementary way, papers were presented at the thematic ICLPRP conferences, and a call was made to authors willing to prepare high-quality and relevant papers to the journal, with the confidence that their work would become part of a fundamental reference collection regarding the present state-of-the-art LSP technology. The Special Issue includes two reviews and nine research papers. Each contribution adds to the reference knowledge of LSP technology and covers the practical totality of open issues, which will lead to present-day research at worldwide universities, research centers, and industrial companies.

History of engineering & technology --- laser peening --- fatigue --- residual stress --- laser shock waves --- laser peening history --- laser shock peening --- residual stresses --- shot pattern --- energy density --- overlap --- hole drilling --- AA 2024 --- cladded aluminum --- notch --- aluminium alloys --- finite element method --- polymers --- solid confinement --- VISAR measurement --- laser shock processing --- plasma diagnosis --- electron density --- dry laser peening --- femtosecond laser --- shock wave --- laser welding --- 2024 aluminum alloy --- high-velocity impact welding --- laser impact welding --- finite element simulation --- experimental analysis --- microhardness --- resonant fatigue resistance --- roughness --- aluminum alloys --- handheld laser --- nuclear power reactor --- stress corrosion cracking --- anisotropy --- FEM analysis --- Mg AZ31B alloy --- n/a

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• Reference Manager
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Laser shock processing (LSP) is a continuously developing effective technology used to improve surface and mechanical properties for metallic alloys. LSP is in direct competition with other established technologies, such as shot peening, both in preventive manufacturing treatments and maintenance/repair operations. The level of LSP maturity has increased in recent years and several thematic international conferences have been organized (i.e., the 7th ICLPRP held in Singapore, June 17–22, 2018) to discuss different developments of a number of key aspects. These aspects include: fundamental laser interaction phenomena; material behavior at high deformation rates/under intense shock waves; laser sources and experimental process implementation; induced microstructural/surface/stress effects; mechanical and surface properties with experimental characterization and testing; numerical process simulation; development and validation of applications; comparison of LSP to competing technologies; and novel related processes. All of these aspects have been recursively treated by well-renowned specialists, providing a firm basis for the further development of the technology in its path to industrial penetration. However, the application of LSP (and related technologies) on different types of materials with different applications (such as the always demanding aeronautical/aerospatial field or the energy generation, automotive, and biomedical fields) still requires extensive effort to elucidate and master different critical aspects. Thus, LSP deserves a great research effort as a necessary step prior to its industrial readiness level. The present Special Issue of Metals in the field of “Laser Shock Processing and Related Phenomena” aims, from its initial launching date, to collect (especially for the use of LSP application developers in different target sectors) a number of high-quality and relevant papers representing state-of-the-art technology that is useful to newcomers in realizing its wide and relevant prospects as a key manufacturing technology. Consequently, in an additional and complementary way, papers were presented at the thematic ICLPRP conferences, and a call was made to authors willing to prepare high-quality and relevant papers to the journal, with the confidence that their work would become part of a fundamental reference collection regarding the present state-of-the-art LSP technology. The Special Issue includes two reviews and nine research papers. Each contribution adds to the reference knowledge of LSP technology and covers the practical totality of open issues, which will lead to present-day research at worldwide universities, research centers, and industrial companies.

History of engineering & technology --- laser peening --- fatigue --- residual stress --- laser shock waves --- laser peening history --- laser shock peening --- residual stresses --- shot pattern --- energy density --- overlap --- hole drilling --- AA 2024 --- cladded aluminum --- notch --- aluminium alloys --- finite element method --- polymers --- solid confinement --- VISAR measurement --- laser shock processing --- plasma diagnosis --- electron density --- dry laser peening --- femtosecond laser --- shock wave --- laser welding --- 2024 aluminum alloy --- high-velocity impact welding --- laser impact welding --- finite element simulation --- experimental analysis --- microhardness --- resonant fatigue resistance --- roughness --- aluminum alloys --- handheld laser --- nuclear power reactor --- stress corrosion cracking --- anisotropy --- FEM analysis --- Mg AZ31B alloy --- n/a