scholarly journals Laser-induced transient magnons in Sr3Ir2O7 throughout the Brillouin zone

2021 ◽  
Vol 118 (22) ◽  
pp. e2103696118
Author(s):  
Daniel G. Mazzone ◽  
Derek Meyers ◽  
Yue Cao ◽  
James G. Vale ◽  
Cameron D. Dashwood ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Brillouin Zone ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Magnetic Interactions ◽  
Great Promise ◽  
X Ray ◽  
Magnetic Correlations ◽  
X Ray Scattering ◽  
Physical Phenomena

Although ultrafast manipulation of magnetism holds great promise for new physical phenomena and applications, targeting specific states is held back by our limited understanding of how magnetic correlations evolve on ultrafast timescales. Using ultrafast resonant inelastic X-ray scattering we demonstrate that femtosecond laser pulses can excite transient magnons at large wavevectors in gapped antiferromagnets and that they persist for several picoseconds, which is opposite to what is observed in nearly gapless magnets. Our work suggests that materials with isotropic magnetic interactions are preferred to achieve rapid manipulation of magnetism.

Spatial distribution of soft x-ray line emissions from aluminum plasma excited by a pair of femtosecond-laser pulses

2006 ◽  
Vol 99 (6) ◽  
pp. 063302 ◽  
Author(s):  
Yasuaki Okano ◽  
Katsuya Oguri ◽  
Tadashi Nishikawa ◽  
Hidetoshi Nakano
Keyword(s):  
Spatial Distribution ◽  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
X Ray ◽  
Aluminum Plasma

scholarly journals Micromachining of Transparent Biocompatible Polymers Applied in Medicine Using Bursts of Femtosecond Laser Pulses

Micromachines ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1093
Author(s):  
Evaldas Kažukauskas ◽  
Simas Butkus ◽  
Piotr Tokarski ◽  
Vytautas Jukna ◽  
Martynas Barkauskas ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Femtosecond Laser ◽  
Contact Lenses ◽  
Laser Pulses ◽  
Laser Micromachining ◽  
Femtosecond Laser Pulses ◽  
Intraocular Lenses ◽  
Great Promise ◽  
Biocompatible Polymers ◽  
Mechanical Methods

Biocompatible polymers are used for many different purposes (catheters, artificial heart components, dentistry products, etc.). An important field for biocompatible polymers is the production of vision implants known as intraocular lenses or custom-shape contact lenses. Typically, curved surfaces are manufactured by mechanical means such as milling, turning or lathe cutting. The 2.5 D objects/surfaces can also be manufactured by means of laser micromachining; however, due to the nature of light–matter interaction, it is difficult to produce a surface finish with surface roughness values lower than ~1 µm Ra. Therefore, laser micromachining alone can’t produce the final parts with optical-grade quality. Laser machined surfaces may be polished via mechanical methods; however, the process may take up to several days, which makes the production of implants economically challenging. The aim of this study is the investigation of the polishing capabilities of rough (~1 µm Ra) hydrophilic acrylic surfaces using bursts of femtosecond laser pulses. By changing different laser parameters, it was possible to find a regime where the surface roughness can be minimized to 18 nm Ra, while the polishing of the entire part takes a matter of seconds. The produced surface demonstrates a transparent appearance and the process shows great promise towards commercial fabrication of low surface roughness custom-shape optics.

Hard X-ray generation and plasma filament formation under interaction of femtosecond laser pulses with large molecular clusters

2013 ◽  
Vol 67 (3) ◽  
Author(s):  
Vyacheslav M. Gordienko ◽  
Murat S. Dzhidzhoev ◽  
Irina A. Zhvaniya ◽  
Viktor T. Platonenko ◽  
Dmitriy N. Trubnikov ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Molecular Clusters ◽  
Femtosecond Laser Pulses ◽  
Filament Formation ◽  
X Ray ◽  
Plasma Filament
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