Revealing laser-coherent electron features using phase-of-the-phase spectroscopy

Tulsky, V. A.; Krebs, B.; Tiggesbäumker, J.; Bauer, Dieter

doi:10.1088/1361-6455/ab69ab

Cited by 13 publications

(18 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To quantitatively characterize the relative phase dependence of the signal, we further analyze the NDs employing the phaseof-the-phase spectroscopy, 37,38 which has been proposed to reveal the different orbits in strong-field ionization. [39][40][41] In this method, the higher-order Fourier component of NDs is very small, and thus it is canceled out safely here. Figure 2(a) shows an example of the signal at the momentum p ¼ ð−0.6; 0.1Þ a.u.…”

Section: Resultsmentioning

confidence: 99%

Resolving and weighing the quantum orbits in strong-field tunneling ionization

Tan

et al. 2021

Adv. Photon.

View full text Add to dashboard Cite

Tunneling ionization of atoms and molecules induced by intense laser pulses contains the contributions of numerous quantum orbits. Identifying the contributions of these orbits is crucial for exploring the application of tunneling and for understanding various tunneling-triggered strong-field phenomena. We perform a combined experimental and theoretical study to identify the relative contributions of the quantum orbits corresponding to the electrons tunneling ionized during the adjacent rising and falling quarter cycles of the electric field of the laser pulse. In our scheme, a perturbative second-harmonic field is added to the fundamental driving field. By analyzing the relative phase dependence of the signal in the photoelectron momentum distribution, the relative contributions of these two orbits are unambiguously determined. Our results show that their relative contributions sensitively depend on the longitudinal momentum and modulate with the transverse momentum of the photoelectron, which is attributed to the interference of the electron wave packets of the long orbit. The relative contributions of these orbits resolved here are important for the application of strong-field tunneling ionization as a photoelectron spectroscopy for attosecond time-resolved measurements.

show abstract

Section: Resultsmentioning

confidence: 99%

Resolving and weighing the quantum orbits in strong-field tunneling ionization

Tan

et al. 2021

Adv. Photon.

View full text Add to dashboard Cite

show abstract

“…Mathematically, the value of Φ POP represents the waiting time (Φ POP < 0) or the passed time (Φ POP > 0) of the appearing instant of the yield peak with respect to the instant of φ RP = 0 during the yield oscillation. However, a clear physical meaning of Φ POP is not identified in previous phase-of-phase experiments [18][19][20][21][22][23] .…”

Section: /19mentioning

confidence: 86%

“…Recently, the phase-of-phase photoelectron spectroscopy was introduced to extract the scattering structural information of atoms, molecules and nanoparticles [18][19][20][21][22][23] , in which the momentum-resolved electron yield is Fourier transformed with respect to the relative phase between two-color laser fields to obtain the phase of the yield oscillation, which is the so-called phase of the phase. The phase-of-phase spectrum provides rich dynamical information than the static photoelectron spectra measured in the one-color field.…”

mentioning

confidence: 99%

Complete characterization of sub-Coulomb-barrier tunnelling with phase-of-phase attoclock

Han

Wang

et al. 2021

Nat. Photon.

View full text Add to dashboard Cite

Laser-induced electron tunneling, triggering a broad range of ultrafast phenomena such as the generation of attosecond light pulses, photoelectron diffraction and holography, has laid the foundation of strong-field physics and attosecond science. Using the attoclock constructed by single-color elliptically polarized laser fields, previous experiments have measured the tunneling rates, exit positions, exit velocities and delay times for some specific electron trajectories, which are mostly born at the field peak instant where the laser electric field and the formed potential barrier are stationary in terms of the derivative versus time. From the view of the wave-particle dualism, the electron phase under a classically forbidden, tunneling barrier has not been measured, which is at the heart of quantum tunneling physics. Here we present a robust measurement of tunneling dynamics including the electron sub-barrier phase and amplitude. We combine attoclock technique with two-color phase-of-the-phase spectroscopy to accurately calibrate the angular streaking relation and to probe the non-stationary tunneling dynamics by manipulating a rapidly changing potential barrier. This phase-of-phase attoclock (POP attoclock) directly links the measured phase of the two-color relative phase with the ionization instant for the photoelectron with any final momentum on the "detector", which allows us to reconstruct the imaginary tunneling time and the accumulated phase under the barrier. The POP attoclock provides a general time-resolved approach to access the underlying quantum dynamics in intense-light-matter interactions.

show abstract

“…In strong field ionization, the interaction of the liberated electron with the remaining ion has drawn considerable attention [1][2][3]. In particular, the intensity regime differentiating multiphoton and field-driven ionization is of interest [4].…”

mentioning

confidence: 99%

“…In order to fully resolve the electron dynamics experimentally, the driving laser field has to be adjusted on a time scale shorter than an optical cycle. Experiments using two-color pulses are appealing, since the superimposed laser fields allows for a control of the relative intensity and phase as well as polarization [11][12][13]. For resolving phase dependencies covering the entire PAD, phase-of-the-phase electron momentum spectroscopy (P oP ) has been introduced recently [14].…”

mentioning

confidence: 99%

Phase-of-the-phase electron momentum spectroscopy on single metal atoms in helium nanodroplets

Krebs¹,

Tulsky²,

Kazak³

et al. 2021

Preprint

View full text Add to dashboard Cite

Magnesium atoms fully embedded in helium nanodroplets are exposed to two-color laser pulses in order to exemplarily study the contribution of a dense and finite medium on multiphoton-triggered abovethreshold ionization (ATI). The angular-resolved photoelectron spectra show striking differences with respect to results obtained on free atoms. Scattering of the Mg photoelectrons, when traversing the helium environment, causes the angular distribution to become almost isotropic. Furthermore, we observe a marked increase in the ATI order, pointing out the impact of the helium environment on the concerted electron emission process. Phase-of-the-phase spectroscopy, however, reveals a marked loss in the 2ω-ω phase dependence of the electron signal. Taking into account sideband formation on a quantitative level, a Monte-Carlo simulation which includes laser-assisted electron scattering can reproduce the experimental spectra and give insights into the strong field-induced electron emission from disordered systems.

show abstract

Revealing laser-coherent electron features using phase-of-the-phase spectroscopy

Cited by 13 publications

References 52 publications

Resolving and weighing the quantum orbits in strong-field tunneling ionization

Resolving and weighing the quantum orbits in strong-field tunneling ionization

Complete characterization of sub-Coulomb-barrier tunnelling with phase-of-phase attoclock

Phase-of-the-phase electron momentum spectroscopy on single metal atoms in helium nanodroplets

Contact Info

Product

Resources

About