Results 21 to 30 of about 3,715,768 (201)

Fibre Bragg grating fabrication in germanosilicate fibres with 244nm femtosecond laser light

, 2006
The ability to fabricate strong and extraordinarily stable Bragg gratings in any type of fibre using femtosecond laser light has attracted much interest in the recent past. The induced index change has been attributed to glass densification brought about
Banks, D.P., D. P Banks, M. Ibsen, Canning, J., Mills, J.D., Ibsen, M., A. Canagasabey, Canagasabey, A., J. Canning, J. D. Mills   +9 more
core   +1 more source

First-order strong-field QED processes in a tightly focused laser beam [PDF]

, 2017
In a previous article [Phys. Rev. Lett. 117, 213201 (2016)] we have determined the angular resolved and the total energy spectrum of a positron produced via nonlinear Breit-Wheeler pair production by a high-energy photon counterpropagating with respect ...
A. Di Piazza, Di Piazza, A.
core   +1 more source

Demonstration of tunability of HOFI waveguides via start-to-end simulations

Physical Review Research, 2023
In recent years, hydrodynamic optical-field-ionized (HOFI) channels have emerged as a promising technique to create laser waveguides suitable for guiding tightly focused laser pulses in a plasma, as needed for laser-plasma accelerators.
S. M. Mewes, G. J. Boyle, A. Ferran Pousa, R. J. Shalloo, J. Osterhoff, C. Arran, L. Corner, R. Walczak, S. M. Hooker, M. Thévenet   +9 more
doaj   +1 more source

Immunocytochemical Localization of XRCC1 and γH2AX Foci Induced by Tightly Focused Femtosecond Laser Radiation in Cultured Human Cells

Molecules, 2021
To assess the prospects for using intense femtosecond laser radiation in biomedicine, it is necessary to understand the mechanisms of its action on biological macromolecules, especially on the informational macromolecule—DNA.
Alexandr Zalessky, Yuriy Fedotov, Elizaveta Yashkina, Viktor Nadtochenko, Andreyan N. Osipov   +4 more
doaj   +1 more source

Analysis of the Effect of Pulse Length and Magnetic Field Strength on Nonlinear Thomson Scattering

Applied Sciences
In this paper, two parameters of the applied magnetic field—magnetic field strength and pulse length—are modified, the spatial properties of electron trajectories and radiation are studied, and conclusions are drawn.
Haokai Wang, Feiyang Gu, Yi Zhang, Yubo Wang, Qingyu Yang, Youwei Tian   +5 more
doaj   +1 more source

Generation of a few femtosecond keV x-ray pulse via interaction of a tightly focused laser copropagating with a relativistic electron bunch

Physical Review Special Topics. Accelerators and Beams, 2011
It is demonstrated in a numerical simulation that an intense fs keV x-ray pulse can be generated by the interaction of a tightly focused femtosecond laser copropagating with an electron bunch. In general, the interaction of a loosely focused (focal spot ∼
Sang-Young Chung, Hae June Lee, Kitae Lee, Dong Eon Kim   +3 more
doaj   +1 more source

Trapped ions quantum logic gate with optical tweezers and the Magnus effect

Physical Review Research, 2023
We consider the implementation of quantum logic gates in trapped ions using tightly focused optical tweezers. Strong polarization gradients near the tweezer focus lead to qubit-state-dependent forces on the ion.
M. Mazzanti, R. Gerritsma, R. J. C. Spreeuw, A. Safavi-Naini   +3 more
doaj   +1 more source

Simulation of laser-driven cratering experiments on aluminum [PDF]

, 2019
After a brief description of the physical principles involved in the cratering process, the authors present a specific methodology to simulate laser-driven cratering experiments performed with a long pulse duration (100 ns) and a small focal spot ...
Jean-Luc Rullier, Laurent Videau, Laurent Berthe, AUBERT, Bertrand, LESCOUTE, Emilien, David Hebert, BERTHE, Laurent, VIDEAU, Laurent, HEBERT, David, RULLIER, Jean-Luc, Emilien Lescoute, Bertrand Aubert   +11 more
core   +1 more source

An intuitive approach to structuring the three electric field components of light

New Journal of Physics, 2019
This paper presents intuitive interpretations of tightly focused beams of light by drawing analogies with two-dimensional electrostatics, magnetostatics and fluid dynamics.
F Maucher, S Skupin, S A Gardiner, I G Hughes   +3 more
doaj   +1 more source

Laser-Patterned Alumina Mask and Mask-Less Dry Etch of Si for Light Trapping with Photonic Crystal Structures

Micromachines, 2023
Ultra-short 230 fs laser pulses of a 515 nm wavelength were tightly focused onto 700 nm focal spots and utilised in opening ∼0.4–1 μm holes in alumina Al2O3 etch masks with a 20–50 nm thickness.
Jovan Maksimovic, Haoran Mu, Daniel Smith, Tomas Katkus, Mantas Vaičiulis, Ramūnas Aleksiejūnas, Gediminas Seniutinas, Soon Hock Ng, Saulius Juodkazis   +8 more
doaj   +1 more source