Zobrazeno 1 - 10
of 458
pro vyhledávání: '"Plaja, L."'
Publikováno v:
Phys. Rev. A 98, 043433 (2018)
Novel perspectives of controlling molecular systems have recently arisen from the possibility of generating attosecond pulses in the ultraviolet regime and tailoring electron dynamics in its natural time scale. The cornerstone mechanism is the so-cal
Externí odkaz:
http://arxiv.org/abs/1810.11523
Publikováno v:
Phys. Rev. Lett. 111, 083602 (2013)
We present a theoretical study of high-order harmonic generation (HHG) and propagation driven by an infrared field carrying orbital angular momentum (OAM). Our calculations unveil the following relevant phenomena: extreme-ultraviolet harmonic vortice
Externí odkaz:
http://arxiv.org/abs/1507.00635
Autor:
Holgado, W., Hernández-García, C., Alonso, B., Miranda, M., Silva, F., Plaja, L., Crespo, H., Sola, I. J.
Publikováno v:
Phys. Rev. A 93, 013816 (2016)
We present observations of the emission of XUV continua in the 20-37 eV region by high harmonic generation (HHG) with $4$-$7\ \mathrm{fs}$ pulses focused onto a Kr gas jet. The underlying mechanism relies on coherent control of the relative delays an
Externí odkaz:
http://arxiv.org/abs/1504.04063
Generation of Bright Isolated Attosecond Soft X-Ray Pulses Driven by Multi-Cycle Mid-Infrared Lasers
Autor:
Chen, M. -C., Hernández-García, C., Mancuso, C., Dollar, F., Galloway, B., Popmintchev, D., Huang, P. -C., Walker, B., Plaja, L., Jaron-Becker, A., Becker, A., Popmintchev, T., Murnane, M. M., Kapteyn, H. C.
High harmonic generation driven by femtosecond lasers makes it possible to capture the fastest dynamics in molecules and materials. However, to date the shortest attosecond (as) pulses have been produced only in the extreme ultraviolet (EUV) region o
Externí odkaz:
http://arxiv.org/abs/1401.0240
Publikováno v:
Phys. Rev. A. 81, 033420 (2010)
We analize the dipole spectrum of a two-level atom excited by a non-resonant intense monochromatic field, under the electric dipole approximation and beyond the rotating wave approximation. We show that the apparently complex spectral structure can b
Externí odkaz:
http://arxiv.org/abs/1003.4566
Publikováno v:
Opt. Express 18, 3660-3671 (2010)
Intense laser ionization expands Einstein's photoelectric effect rules giving a wealth of phenomena widely studied over the last decades. In all cases, so far, photons were assumed to carry one unit of angular momentum. However it is now clear that p
Externí odkaz:
http://arxiv.org/abs/1002.1318
Autor:
Plaja, L., Roman, J. San
We demonstrate the existence of a new class of two-component vector solitary waves in which dispersion coefficients have of opposite signs. Stability is achieved by inclusion of an additional linear coupling between the vector components that counter
Externí odkaz:
http://arxiv.org/abs/cond-mat/0506319
We report the observation of the self-guided propagation of 120 fs, 0.56 mJ infrared radiation in air for distances greater than one meter. In contrast to the known case of filamentation, in the present experiment the laser power is lower than the co
Externí odkaz:
http://arxiv.org/abs/physics/0409106
Autor:
Plaja, L., Roman, J. San
We present a detailed description of the formation of bright solitary waves in optical lattices. To this end, we have considered a ring lattice geometry with large radius. In this case, the ring shape does not have a relevant effect in the local dyna
Externí odkaz:
http://arxiv.org/abs/cond-mat/0404666
Autor:
Plaja, L., Santos, L.
The expansion of a Bose-Einstein condensate in an atomic waveguide is analyzed. We study different regimes of expansion, and identify a transient regime between one-dimensional and three-dimensional dynamics, in which the properties of the condensate
Externí odkaz:
http://arxiv.org/abs/cond-mat/0111275