Effects of orientation and alignment in high-harmonic generation and above threshold ionization

Abstract

When molecules interact with intense light sources of femtosecond or shorter duration the rotational degrees of freedom are frozen during the response to the strong nonperturbative interaction. We show how the frozen degrees of freedom affect the measurable signals in high-harmonic generation and above threshold ionization. High-harmonic generation exhibits optical coherence in the signal from different orientations of the molecule. For ionization, the contributions from different orientations are added incoherently. The effects are demonstrated for realistic alignment and orientation schemes.

4 pages, 2 figures

References in corpus (4)

• High-harmonic generation from arbitrarily oriented diatomic molecules including nuclear motion and field-free alignment
• Symmetry of carrier-envelope phase difference effects in strong-field, few-cycle ionization of atoms and molecules
• Strong-field ionization of atoms and molecules: The two-term saddle point method
• Alignment and orientation of an adsorbed dipole molecule

Cited by in corpus (7)

• Two-center minima in harmonic spectra from aligned polar molecules
• Inducing elliptically polarized high-order harmonics from aligned molecules with linearly polarized femtosecond pulses
• A theory of intense-field dynamic alignment and high harmonic generation from coherently rotating molecules and interpretation of intense-field ultrafast pump-probe experiments
• Theoretical studies of high-harmonic generation: Effects of symmetry, degeneracy and orientation
• High-order harmonic generation from polyatomic molecules including nuclear motion and a nuclear modes analysis
• Influence of asymmetry and nodal planes on high-harmonic generation in heteronuclear molecules
• Laser-induced bound-state phases in high-order harmonic generation