Results 71 to 80 of about 2,654,873 (296)

Uniform Amorphization of Crystalline Silicon Surfaces Enabled by Deep Ultraviolet Femtosecond Laser Pulses

Advanced Engineering Materials, EarlyView.
Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali, Magali Gregoire, Matys Guyard, Tatiana Itina, David Grojo, Pol Sopeña   +5 more
wiley   +1 more source

Generation of Terawatt-Scale Vortex Pulses Based on Optical Parametric Chirped-Pulse Amplification

IEEE Photonics Journal, 2020
In this letter, we report the demonstration of terawatt (TW)-scale femtosecond vortex laser pulses based on noncollinear optical parametric chirped-pulse amplification (OPCPA) centered at 800 nm.
Wangjun Pan, Xiaoyan Liang, Lianghong Yu, Aotian Wang, Jinfeng Li, Ruxin Li   +5 more
doaj   +1 more source

Dimensional Analysis of Double-Track Microstructures in a Lithium Niobate Crystal Induced by Ultrashort Laser Pulses

Photonics, 2023
Double-track microstructures were induced in the bulk of a z-cut lithium niobate crystal by 1030 nm 240 fs ultrashort laser pulses with a repetition rate of 100 kHz at variable pulse energies exceeding the critical Kerr self-focusing power.
Yulia Gulina, Jiaqi Zhu, Alexey Gorevoy, Mikhail Kosobokov, Anton Turygin, Boris Lisjikh, Andrey Akhmatkhanov, Vladimir Shur, Sergey Kudryashov   +8 more
doaj   +1 more source

Spectral Enhancement in the Double Pulse Regime of Laser Proton Acceleration [PDF]

Physical Review Letters, 2010
The use of two separate ultraintense laser pulses in laser-proton acceleration was compared to the single pulse case employing the same total laser energy. A double pulse profile, with the temporal separation of the pulses varied between 0.75-2.5 ps, was shown to result in an increased maximum proton energy and an increase in conversion efficiency to ...
Markey, K., McKenna, P., Brenner, C. M., Carroll, D. C., Günther, M.M., Harres, K., Kar, S., Lancaster, K., Nürnberg, F., Quinn, M. N., Robinson, A. P. L., Roth, M., Zepf, M., Neely, D.   +13 more
openaire   +5 more sources

Adaptive Foam 3D Printing of Ultralight and Multifunctional Materials

Advanced Engineering Materials, EarlyView.
Adaptive foam 3D printing, enabled by expandable microspheres, imparts cellular structures to thermoplastic and thermosetting polymers, manufactured through a variety of processes including fused filament fabrication, direct ink writing, digital light processing, and inkjet printing.
Nariman Rajabifar, Amir Ameli
wiley   +1 more source

Two-photon laser scanning fluorescence microscopy using photonic crystal fibre [PDF]

, 2004
We report the application of a simple yet powerful modular pulse compression system, based on photonic crystal fibres which improves upon incumbent twophoton laser scanning fluorescence microscopy techniques.
McConnell, G., Riis, E.
core   +4 more sources

FastNano Liquid: An Automated Platform for Small‐Angle X‐ray Scattering‐Based Materials Discovery

Advanced Engineering Materials, EarlyView.
We present FastNano Liquid, an automated small‐ and wide‐angle X‐ray scattering platform for the combined synthesis and characterization of (nano)materials. The platform is coupled to varied reactor workflows for both in situ studies of reaction kinetics and ex situ screening of synthesis conditions to support machine learning‐guided exploration ...
Pierre‐Baptiste Flandrin, Émeline Cournède, Jens Krarup, Michael Lesa, Foyzul Hasan, Amandine Séné, Arnaud Lahouati, David Benhaiem, Jérémie‐Luc Sanchez, Simon Delacroix, Thierry Gacoin, Fabienne Testard, Damien Faivre, David Carriere, Corinne Chevallard, Olivier Taché, Mark A. Levenstein   +16 more
wiley   +1 more source

Highly coherent picosecond pulse generation with sub-ps jitter and high SMSR by gain switching Discrete Mode laser diodes at 10 GHz line rate [PDF]

, 2009
We demonstrate the generation of picosecond pulses with ~800 fs jitter and SMSR in excess of 60 dB by gain switching a discrete mode laser and compare the results with a commercial DFB ...
Anandarajah, Prince M., Barry, Liam P., Herbert, C., O'Carroll, John, Duke, A.S., Kaszubowska-Anandarajah, Aleksandra, Phelan, Richard, O'Gorman, James   +7 more
core   +2 more sources

INVESTIGATION OF THE CHANNEL-FORM EFFECT ON THE FORMATION PROCESSES OF AND NANOCLUSTERS IN PLASMA WHEN ALUMINUM TARGET IS SUBJECTED TO SERIES OF DOUBLE LASER PULSES IN AIR

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2019
The microchannel-form effect on the formation of AlO and AlN in the laser plasma has been studied when the surface of a target of D16 Т aluminum alloy was subjected to series of sequential focused double laser pulses in air.
K. Bazzal, Е.S. Voropay, А.P. Zajogin, М.P. Patapovich   +3 more
doaj   +1 more source

Formation of colloidal solutions of silicon nanoparticles in ethyl alcohol with ultra-short laser pulses

Весці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2021
The study of surface morphology of a silicon target after laser exposure, the formation and study of nanoparticles, obtained by laser ablation by ultrashort infrared pulses, were conducted. The material was processed using a yttrium aluminum garnet laser
A. P. Laskovnev, M. I. Markevich, A. N. Malyshko, V. I. Zhuravleva, A. M. Chaplanov   +4 more
doaj   +1 more source