Numerical attoclock on atomic and molecular hydrogen

Abstract

Numerical attoclock is a theoretical model of attosecond angular streaking driven by a very short, nearly a single oscillation, circularly polarized laser pulse. The reading of such an attoclock is readily obtained from a numerical solution of the time-dependent Schrödinger equation as well as a semi-classical trajectory simulation. By making comparison of the two approaches, we highlight the essential physics behind the attoclock measurements. In addition, we analyze the predictions of the Keldysh-Rutherford model of the attoclock [Phys. Rev. Lett. 121, 123201 (2018)]. In molecular hydrogen, we highlight a strong dependence of the width of the attoclock angular peak on the molecular orientation and attribute it to the two-center electron interference. This effect is further exemplified in the weakly bound neon dimer.

arXiv comment8 pages, 7 figures

References in corpus (11)

• Double-slit photoelectron interference in strong-field ionization of the neon dimer
• Tunneling Time in Ultrafast Science is Real and Probabilistic
• Experimental evidence for Wigner's tunneling time
• Strong-field approximation for harmonic generation in diatomic molecules
• Attoclock revisited on electron tunnelling time
• Direct Experimental Access to the Nonadiabatic Initial Momentum Offset upon Tunnel Ionization
• iSURF: A family of infinite-time surface flux methods
• Keldysh-Rutherford model for attoclock
• Strong Orientation Effects in Ionization of H${}_2^{+}$ by Short, Intense, High-Frequency Light Sources
• Calculation of intermediate-energy electron-impact ionization of molecular hydrogen and nitrogen using the paraxial approximation
• Molecular Recollision Interferometry in High Harmonic Generation

Cited by in corpus (9)

• The attoclock and the tunnelling time debate
• Attosecond Ionization Time Delays in Strong-Field Physics
• Reconciling conflicting approaches for the tunneling time delay in strong field ionization
• Orientation Dependent Dissociative Ionization of H${}_2$ in Strong Elliptic Laser Fields: Modification of the release time through molecular orientation
• Alignment dependence of photoelectron momentum distributions for diatomic molecules N${}_2$ in strong elliptical laser fields
• Photoelectron momentum distributions in the strong-field ionization of atomic hydrogen by few-cycle elliptically polarized optical pulses
• The role of reflections in the generation of a time delay in strong field ionization
• Sub-barrier recollisions and the three classes of tunneling time delays in strong-field ionization
• Effect of the finite speed of light in ionization of extended systems