Towards a theory of attosecond transient recorder

Abstract

Laser assisted photoemission by a chirped subfemtosecond extreme ultraviolet (XUV) pulse is considered within an exactly solvable quantum-mechanical model. Special emphasis is given to the energy dependence of photoexcitation cross-section. The streaked spectra are analyzed within the classical picture of initial time-momentum distribution r_ini(p,t) of photoelectrons mapped to the final energy scale. The actual time-momentum distribution in the absence of the probe laser field is shown to be a poor choice for r_ini, and a more adequate ansatz is suggested. The semiclassical theory offers a simple practically useful approximation for streaked spectra. Its limitations for sufficiently long chirped XUV pulses are established.

9 pages 8 figures

References in corpus (2)

• Angular distributions of atomic photoelectrons produced in the UV and XUV regimes
• Fast electron generation by Coulomb scattering on spatially correlated ions in a strong laser field

Cited by in corpus (4)

• Attosecond spectroscopy of solids: streaking phase shift due to lattice scattering
• Multiconfigurational time-dependent Hartree-Fock calculations for photoionization of one-dimensional Helium
• Theoretical description of field-assisted post-collision interaction in Auger decay of atoms
• Electronic correlations in double ionization of atoms in pump-probe experiments