Zobrazeno 1 - 10
of 23
pro vyhledávání: '"B. A. deHarak"'
Autor:
D. Chetty, R. D. Glover, X. M. Tong, B. A. deHarak, H. Xu, N. Haram, K. Bartschat, A. J. Palmer, A. N. Luiten, P. S. Light, I. V. Litvinyuk, R. T. Sang
Publikováno v:
Physical Review Letters. 128
We present a joint experimental-theoretical study on the effect of the carrier-envelope phase (CEP) of a few-cycle pulse on the atomic excitation process. We focus on the excitation rates of argon as a function of CEP in the intensity range from 50-3
Autor:
N. Smith, N. Douguet, Kathryn R. Hamilton, Xiao-Min Tong, Igor Litvinyuk, B. A. deHarak, D. Chetty, Andre N. Luiten, Robert Sang, Han Xu, Klaus Bartschat, R. D. Glover, Thomas Pauly, J. P. Ziegel, Philip S. Light
We investigate AC Stark-shifted resonances in argon with ultrashort near-infrared pulses. Using 30 fs pulses we observe periodic enhancements of the excitation yield in the intensity regions corresponding to the absorption of 13 and 14 photons. By re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b93657ddb25ca236b86bd4d86bda28d
http://arxiv.org/abs/1912.06280
http://arxiv.org/abs/1912.06280
Publikováno v:
Physical Review A. 99
Experiments on free-free electron scattering by an Ar target are reported. The angular distribution of 350 eV electrons, elastically scattered at angles between 4∘ and 80∘ in the presence of 1.17 eV photons from a Nd:YAG laser, shows a pronounced
Publikováno v:
Journal of Physics: Conference Series. 1412:092024
Synopsis Experiments and theory will be presented for the emission/absorption of 1.17 eV photons by electrons during the electron-impact excitation of a helium target in a laser field.
Autor:
Igor Litvinyuk, R. T. Sang, Andre N. Luiten, H. Xu, Philip S. Light, A. J. Palmer, B. A. deHarak, D. Chetty, R. D. Glover
Publikováno v:
Journal of Physics: Conference Series. 1412:092004
Synopsis We present the first experimental evidence which qualitatively shows that frustrated tunnel ionization results in a larger number of excited neutrals per a tunnelling event for 6 fs pulses compared to 30 fs pulses. In addition, we also obser
Autor:
Andre N. Luiten, D. Chetty, B. A. Deharak, Philip S. Light, Robert Sang, A. J. Palmer, M. A. Dakka, John Holdsworth, Igor Litvinyuk, R. D. Glover
Publikováno v:
Frontiers in Optics / Laser Science.
Frustrated tunnel ionization (FTI) is one of the dominant channels in strong field ionization that results in the excitation of atoms. Recent studies have shown that there is a significant number of FTI events for multi-cycle pulses with the theory p
Autor:
B. A. deHarak, N. L. S. Martin
Publikováno v:
Physical Review A. 93
We report measurements of one-, two-, and three-photon processes during the elastic scattering of electrons through ${90}^{\ensuremath{\circ}}$ by helium, argon, and molecular-nitrogen targets, in the presence of 1.17-eV photons from a Nd:YAG laser.
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 51:134003
Experiments on free–free electron scattering, specifically the absorption or emission of 1.17 eV photons from a Nd:YAG laser field by an unbound electron when it is scattered by an atom or molecule, are reviewed. For large scattering angles such ex
Publikováno v:
Physical Review A. 90
Autor:
B. A. Deharak, C.M. Weaver, Mahsa Siavashpouri, B N Kim, N. L. S. Martin, Benjamin Nosarzewski
Publikováno v:
Plasma Sources Science and Technology. 25:035021
This work will detail the effects of laser polarization direction (relative to the momentum transfer direction) on laser-assisted free–free scattering. Such processes play a role in the gas breakdown that occurs in electric discharges as well as pr