Results 21 to 30 of about 99,111 (295)
Ultrafast electron diffraction using an ultracold source [PDF]
, 2014 We present diffraction patterns from micron-sized areas of mono-crystalline graphite obtained with an ultracold and ultrafast electron source. We show that high spatial coherence is manifest in the visibility of the patterns even for picosecond bunches ...
Engelen, W. J. +3 more
core +7 more sources
Modulated Noncollinear Optical Parametric Amplifier Output Induced by Stimulated Raman Scattering
Applied Sciences, 2021 We studied spectra of the amplified signal from a noncollinear optical parametric amplifier (NOPA) based on a Ti:sapphire laser and BBO crystal gain medium.
Takayoshi Kobayashi, Zhuan Wang, Jun Liu
doaj +1 more source
Ultrafast laser inscription of mid-IR directional couplers for stellar interferometry [PDF]
, 2014 We report the ultrafast laser fabrication and mid-IR characterization (3.39 microns) of four-port evanescent field directional couplers. The couplers were fabricated in a commercial gallium lanthanum sulphide glass substrate using sub-picosecond laser ...
Arriola, Alexander +4 more
core +2 more sources
High-Power Lensless THz Imaging of Hidden Objects
IEEE Access, 2021 The potential of pulsed THz radiation for time-of-flight imaging applications is well recognized. However, advances in this field are currently severely limited by the low average power of ultrafast THz sources.
Samira Mansourzadeh +9 more
doaj +1 more source
Ultrafast laser inscription: perspectives on future integrated applications [PDF]
, 2014 This paper reviews the recent advancements achieved using ultrafast laser inscription (ULI) that highlight the cross-disciplinary potential of the technology.
Ams M. +13 more
core +1 more source
Scientific Reports, 2017 The fabrication of nanoporous anatase TiO2 on a microstructured Ti base is achieved through an innovative hybrid fabrication method involving femtosecond laser ablation coupled with H2O2 oxidation and annealing. The anatase TiO2 micro-nanostructures have
Ting Huang +5 more
doaj +1 more source
Ultrafast generation and detection of coherent acoustic phonons in SnS0.91Se0.09
Results in Physics, 2023 The rapid growth of attention to tin sulfide (SnS) is due to its efficient application in the field of thermoelectricity, and its doping product SnS0.91Se0.09 can obtain a high average thermoelectric figure of merit (ZTave≈ 1.25).
Xiao-Ran Ma +5 more
doaj +1 more source
Dose-efficient scanning Compton X-ray microscopy
Light: Science & Applications, 2023 The highest resolution of images of soft matter and biological materials is ultimately limited by modification of the structure, induced by the necessarily high energy of short-wavelength radiation.
Tang Li +12 more
doaj +1 more source
Correlation analysis among multiple images of plasma induced during fiber laser–arc hybrid welding
AIP Advances, 2020 In this study, the multiple imaging morphological features of plasma have been observed by using the multiple-imaging technique during the fiber laser–tungsten insert gas (TIG) arc hybrid welding.
Jianglin Zou, Lida Wang, Rongshi Xiao
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Journal of Materials Research and Technology, 2020 Severe spattering is one of the common problems during fiber laser keyhole welding. In this study, the correlation between the spatter formation and laser-induced evaporation vapor on the front keyhole wall (FKW) was studied by changing the welding speed
Gaolei Zhang +4 more
doaj +1 more source