The plateau in above-threshold ionization: the keystone of rescattering physics

Becker, W.; Goreslavski, S. P.; Milošević, D. B.; Paulus, Gerhard G.

doi:10.1088/1361-6455/aad150

Cited by 75 publications

(55 citation statements)

References 176 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In order to confirm this statement, in Fig. 6 we present snapshots of momentum photoelectron distributions (for fixed CEP and delay value) at time instances separated by multiple IR periods (corresponding to zeroes of vector potential [25]). The obtained structures remain mostly fixed after the high intensity VIS pulse is over (see times t > 1[τ IR ] in Fig.…”

Section: D Momenta Distributionsmentioning

confidence: 65%

Rescattering effects in streaking experiments of strong-field ionization

Mandrysz¹,

Kübel²,

Zakrzewski³

et al. 2019

Phys. Rev. A

View full text Add to dashboard Cite

Strong field ionization provides a unique mean to address complex dynamics of an electron in competing Coulomb and laser fields. Recent streak camera experiment (Kübel, et al.,[1]) analyzed asymmetries in the low-energy region of ejected electron momenta distribution and associated them with multiple rescattering of the electron on the parent ion. In this work we directly confirm the multiple rescattering nature of the asymmetry in the low-energy region. Such electron-ion collisions cannot be described within one-dimensional simulations even taking into account focal-volume averaging. Using time-dependent Schrödinger equation simulation in two dimensions supplemented by the insight from strong field semi-classical approximation we identify the dominant interference features of the complex photoelectron momentum maps and find their traces in the experiment. In particular, the holographic structures remain visible in experimental results averaged over carrierenvelope phase (CEP). In the case of individual momentum maps when CEP or delay between the two pulses is varied, the structures arising due to rescattering events are influenced by interfering electrons ionized at main peaks of the electric field. With an increase of experimental resolution, such structures record the electron dynamics on a sublaser-cycle time scale. arXiv:1907.03291v1 [physics.atom-ph]

show abstract

Section: D Momenta Distributionsmentioning

confidence: 65%

Rescattering effects in streaking experiments of strong-field ionization

Mandrysz¹,

Kübel²,

Zakrzewski³

et al. 2019

Phys. Rev. A

View full text Add to dashboard Cite

show abstract

“…It should be mentioned that polarization largely affects the electron motion after the emission in the strong laser field regime. For instance, in the case of gas-phase targets, rescattering processes are mostly suppressed under illumination by circularly polarized light because the liberated electrons do not return to the parent ion [44,45]. In the case of a nanotip, however, the electron dynamics under the circularly polarized light are expected to be similar to that under linearly polarized light according to the above simulations.…”

Section: A Plasmonic Responses Under Circularly Polarized Lightmentioning

confidence: 71%

Laser-induced field emission from a tungsten nanotip by circularly polarized femtosecond laser pulses

et al. 2020

View full text Add to dashboard Cite

We have investigated emission patterns and energy spectra of electrons from a tungsten nanotip induced by circularly polarized femtosecond laser pulses. Variations of emission patterns were observed for different helicities of circular polarization while the energy spectra remained almost identical. The physics behind this difference in emission patterns is the change in propagation directions of surface electromagnetic waves on the tip apex. The energy spectra showed the same spectroscopic signatures as the linearly polarized laser in a strong-field regime, which are a low-energy peak and a plateau feature. The low-energy peak is due to a delayed electron emission with respect to a prompt emission. The experimental data and plasmonic simulations support our previous conclusion, where the observed delayed emission processes originate from an inelastic rescattering process. This work demonstrates that the use of circular polarization is an easy means to add extra knobs to control the spatial and temporal emission from a nanotip at the nanometer and femtosecond scale. It could find applications as a helicity-driven subcycle optical switch.We have investigated emission patterns and energy spectra of electrons from a tungsten nanotip induced by circularly polarized femtosecond laser pulses. Variations of emission patterns were observed for different helicities of circular polarization while the energy spectra remained almost identical. The physics behind this difference in emission patterns is the change in propagation directions of surface electromagnetic waves on the tip apex. The energy spectra showed the same spectroscopic signatures as the linearly polarized laser in a strong-field regime, which are a low-energy peak and a plateau feature. The low-energy peak is due to a delayed electron emission with respect to a prompt emission. The experimental data and plasmonic simulations support our previous conclusion, where the observed delayed emission processes originate from an inelastic rescattering process. This work demonstrates that the use of circular polarization is an easy means to add extra knobs to control the spatial and temporal emission from a nanotip at the nanometer and femtosecond scale. It could find applications as a helicity-driven subcycle optical switch.

show abstract

“…In our paper we have shown that the spin asymmetry in HATI by bicircular field survives focal-averaging and thus should be observed in future experiments which will open access to attospin. It should also be mentioned that, without the focal averaging, it would not be possible to explore quantum-mechanical effects such as experimentally observed intensity-dependent enhancements in HATI spectra [2]. Such enhancements are caused by the channel-closing effect.…”

Section: Discussionmentioning

confidence: 99%

“…Available strong laser fields allow the study of new laser-field-induced atomic and molecular processes such as high-order harmonic generation (HHG) [1] and above-threshold ionization (ATI) [2]. These processes are commonly considered for a laser field which is linearly polarized and explained by semiclassical three-step model [3][4][5].…”

Section: Introduction: Three-step Model and Bicircular Laser Fieldmentioning

confidence: 99%

See 1 more Smart Citation

Atomic and Molecular Processes in a Strong Bicircular Laser Field

Milošević

2018

Atoms

View full text Add to dashboard Cite

With the development of intense femtosecond laser sources it has become possible to study atomic and molecular processes on their own subfemtosecond time scale. Table-top setups are available that generate intense coherent radiation in the extreme ultraviolet and soft-X-ray regime which have various applications in strong-field physics and attoscience. More recently, the emphasis is moving from the generation of linearly polarized pulses using a linearly polarized driving field to the generation of more complicated elliptically polarized polychromatic ultrashort pulses. The transverse electromagnetic field oscillates in a plane perpendicular to its propagation direction. Therefore, the two dimensions of field polarization plane are available for manipulation and tailoring of these ultrashort pulses. We present a field that allows such a tailoring, the so-called bicircular field. This field is the superposition of two circularly polarized fields with different frequencies that rotate in the same plane in opposite directions. We present results for two processes in a bicircular field: High-order harmonic generation and above-threshold ionization. For a wide range of laser field intensities, we compare high-order harmonic spectra generated by bicircular fields with the spectra generated by a linearly polarized laser field. We also investigate a possibility of introducing spin into attoscience with spin-polarized electrons produced in high-order above-threshold ionization by a bicircular field.

show abstract

The plateau in above-threshold ionization: the keystone of rescattering physics

Cited by 75 publications

References 176 publications

Rescattering effects in streaking experiments of strong-field ionization

Rescattering effects in streaking experiments of strong-field ionization

Laser-induced field emission from a tungsten nanotip by circularly polarized femtosecond laser pulses

Atomic and Molecular Processes in a Strong Bicircular Laser Field

Contact Info

Product

Resources

About