212 citations · 2k across the 74 of their papers we have counts for
30 papers · 1 filter
Nondipole circularly polarized laser-assisted photoelectron emission
R. Della Picca, J. M. Randazzo, S. D. López +2
We theoretically study atomic laser-assisted photoelectric emission (LAPE) beyond the electric dipole approximation. We present a theoretical description for first-order nondipole…
Above-threshold ionization by polarization-crafted pulses
Camilo Granados, Enrique G. Neyra, Lorena Rebón +1
Coherent light has revolutionized scientific research, spanning biology, chemistry, and physics. To delve into ultrafast phenomena, the development of high-energy, high-tunable lig…
Analog simulation of high harmonic generation in atoms
Javier Argüello-Luengo, Javier Rivera-Dean, Philipp Stammer +4
The demanding experimental access to the ultrafast dynamics of materials challenges our understanding of their electronic response to applied strong laser fields. For this purpose,…
Femtosecond pulse parameter estimation from photoelectron momenta using machine learning
Tomasz Szołdra, Marcelo F. Ciappina, Nicholas Werby +4
Deep learning models have provided huge interpretation power for image-like data. Specifically, convolutional neural networks (CNNs) have demonstrated incredible acuity for tasks s…
Twisting attosecond pulse trains by amplitude-polarization IR pulses
Enrique G. Neyra, Fabian Videla, Demian A. Biasetti +2
Natively, atomic and molecular processes develop in a sub-femtosecond time scale. In order to, for instance, track and capture the electron motion in that scale we need suitable `p…
Static-field ionization model of He-like ions for diagnostics of light field intensity
Erik Lötstedt, Marcelo. F. Ciappina, Kaoru Yamanouchi
We study static-field ionization of He-like ions with nuclear charge number in the range of . Both the tunneling and over-the-barrier regimes are considered. We calc…
Polarization in Strong-Field Ionization of Excited Helium
A. C. Bray, A. S. Maxwell, Y. Kissin +4
We analyze how bound-state excitation, electron exchange and the residual binding potential influence above-threshold ionization (ATI) in Helium prepared in an excited state, o…
Three-electron correlations in strong laser field ionization: Spin induced effects
Dmitry Efimov, Artur Maksymov, Marcelo Ciapina +3
Strong field processes in the non-relativistic regime are insensitive to the electron spin, i.e. the observables appear to be independent of this electron property. This does not h…
Conservation laws for Electron Vortices in Strong-Field Ionisation
Yuxin Kang, Emilio Pisanty, Marcelo Ciappina +3
We investigate twisted electrons with a well defined orbital angular momentum, which have been ionised via a strong laser field. By formulating a new variant of the well-known stro…
Principal frequency of an ultrashort laser pulse
Enrique G. Neyra, Pablo Vaveliuk, Emilio Pisanty +3
We introduce an alternative definition of the main frequency of an ultrashort laser pulse, the principal frequency . This parameter is complementary to the most accepted and w…
Manipulating Twisted Electrons in Strong-Field Ionization
A. S. Maxwell, G. S. J. Armstrong, M. F. Ciappina +5
We investigate the discrete orbital angular momentum (OAM) of photoelectrons freed in strongfield ionization. We use these `twisted' electrons to provide an alternative interpretat…
Laser-assisted photoionization of argon atoms: streaking, sideband and pulse train studying cases
Renata Della Picca, Marcelo F. Ciappina, Maciej Lewenstein +1
We present a theoretical study of atomic laser-assisted photoionization emission (LAPE). We consider an atom driven by a linearly polarized XUV laser in two different scenarios: i)…
Focal-shape effects on the efficiency of the tunnel-ionization probe for extreme laser intensities
M. F. Ciappina, E. E. Peganov, S. V. Popruzhenko
We examine the effect of laser focusing on the potential of a recently discussed scheme [M.F. Ciappina {\em et al}, Phys. Rev. A 99, 043405 (2019); Las. Phys. Lett. 17, 025301 (202…
Theoretical Atto-nano Physics
Marcelo F. Ciappina, Maciej Lewenstein
Two emerging areas of research, attosecond and nanoscale physics, have recently started to merge. Attosecond physics deals with phenomena occurring when ultrashort laser pulses, wi…
CEP-Controlled Molecular Dissociation by Ultrashort Chirped Laser Pulses
S. A. Karakaş, P. Rosenberger, M. F. Ciappina +2
We demonstrate and characterize that a carrier-envelope-phase (CEP)-controlled ultrashortchirped field is an efficient and robust mechanism to modify the dissociation dynamics of m…
Simultaneous control of harmonic yield and energy cutoff of high-harmonic generation using seeded plasmonic-enhanced fields
Irfana N. Ansari, M. S. Mrudul, Marcelo F. Ciappina +2
We study high-order harmonic generation (HHG) driven by seeded plasmonic-enhanced fields. On one hand, plasmonic-enhanced fields have shown a great potential to extend the HHG cuto…
Determination of the spectral variation origin in high-order harmonic generation in noble gases
V. E. Nefedova, M. F. Ciappina, O. Finke +7
One key parameter in the high-order harmonic generation (HHG) phenomenon is the exact frequency of the generated harmonic field. Its deviation from perfect harmonics of the laser f…
Fully differential cross sections for -impact ionization of and
Omid Ghorbani, Ebrahim Ghanbari-Adivi, Marcelo Fabian Ciappina
A semiclassical impact parameter version of the continuum distorted wave-Eikonal initial state theory is developed to study the differential ionization of atoms in collisions…
High-order harmonic generation driven by inhomogeneous plasmonics fields spatially bounded: influence on the cut-off law
E. Neyra, F. Videla, M. F. Ciappina +4
We study high-order harmonic generation (HHG) in model atoms driven by plasmonic-enhanced fields. These fields result from the illumination of plasmonic nanostructures by few-cycle…
Above-threshold ionization (ATI) in multicenter molecules: the role of the initial state
N. Suárez, A. Chacón, E. Pisanty +6
A possible route to extract electronic and nuclear dynamics from molecular targets with attosecond temporal and nanometer spatial resolution is to employ recolliding electrons as `…
High-order harmonic generation in atomic and molecular systems
Noslen Suárez, Alexis Chacón, Jose A. Pérez-Hernández +3
High-order harmonic generation (HHG) results from strong-field laser matter interaction and it is one of the main processes that are used to extract electron structural and dynamic…
Emergence of a higher energy structure in strong field ionization with inhomogeneous electric fields
L. Ortmann, J. A. Pérez-Hernández, M. F. Ciappina +6
Studies of strong field ionization have historically relied on the strong field approximation, which neglects all spatial dependence in the forces experienced by the electron after…
Above-Threshold Ionization and Laser-Induced Electron Diffraction in Diatomic Molecules
N. Suárez, A. Chacón, M. F. Ciappina +3
Strong field photoemission and electron recollision provide a viable route to extract electronic and nuclear dynamics from molecular targets with attosecond temporal resolution. Ho…
High-order harmonic generation driven by chirped laser pulses induced by linear and non linear phenomena
E Neyra, F Videla, J A Pérez-Hernández +3
We present a theoretical study of high-order harmonic generation (HHG) driven by ultrashort optical pulses with different kind of chirps. The goal of the present work is perform a…