Two-Color Strong-Field Photoelectron Spectroscopy and the Phase of the Phase

Abstract

The presence of a weak second-harmonic field in an intense-laser ionization experiment affects the momentum-resolved electron yield, depending on the relative phase between the $\omega$ and the $2\omega$ component. The proposed two-color 'phase-of-the-phase spectroscopy' quantifies for each final electron momentum a relative-phase contrast (RPC) and a 'phase of the phase' (PP), describing how much and with which phase lag, respectively, the yield changes as function of relative phase. Experimental results for RPC and PP spectra for rare gas atoms and CO${}_2$ are presented. The spectra demonstrate a rather universal structure that is analyzed with the help of a simple model based on electron trajectories, wave-packet spreading, and (multiple) rescattering. Details in the PP and RPC spectra are target sensitive and thus may be used to extract structural (or even dynamical) information with high accuracy.

5 pages, REVTeX4, 5 figures

References in corpus (4)

• Accurate retrieval of structural information from laser-induced photoelectron and high-harmonic spectra by few-cycle laser pulses
• Strong Field Approximation for Systems with Coulomb Interaction
• Streaking temporal double slit interference by an orthogonal two-color laser field
• Time-resolving electron-core dynamics during strong field ionization in circularly polarized fields

Cited by in corpus (20)

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• High-order phase-dependent asymmetry in the above-threshold ionization plateau
• Revealing laser-coherent electron features using phase-of-the-phase spectroscopy
• Phase- and intensity-resolved measurements of above threshold ionization by few-cycle pulses
• Quantum interference and imaging using intense laser fields
• Exploring symmetries in photoelectron holography with two-color linearly polarized fields
• Two-color phase-of-the-phase spectroscopy applied to nonperturbative electron-positron pair production in strong oscillating electric fields
• Two-color coherent control in photoemission from gold needle tips
• CEP-Controlled Molecular Dissociation by Ultrashort Chirped Laser Pulses
• Phase- and intensity-dependence of ultrafast dynamics in hydrocarbon molecules in few-cycle laser fields
• Forward-backward asymmetry of photoemission in C${}_{60}$ excited by few-cycle laser pulses
• Unravelling inter-channel quantum interference in below-threshold nonsequential double ionization with statistical measures