Pulse-shape control of two-color interference in high-order-harmonic generation

Abstract

We report on calculations of harmonic generation by neon in a mixed (800-nm + time-delayed 400-nm) laser pulse scheme. In contrast with previous studies we employ a short (few-cycle) 400-nm pulse, finding that this affords control of the interference between electron trajectories contributing to the cutoff harmonics. The inclusion of the 400-nm pulse enhances the yield and cutoff energy, both of which exhibit a strong dependence on the time delay between the two pulses. Using a combination of time-dependent R-matrix theory and a classical trajectory model, we assess the mechanisms leading to these effects.

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Cited by in corpus (11)

• RMT: R-matrix with time-dependence. Solving the semi-relativistic, time-dependent Schrodinger equation for general, multi-electron atoms and molecules in intense, ultrashort, arbitrarily polarized laser pulses
• The Application of Tailored Fields for Studying Chirality and Symmetry
• Two-color phase-of-the-phase spectroscopy in the multiphoton regime
• The imaginary part of the high-harmonic cutoff
• Suppression of individual peaks in two-colour high harmonic generation
• Extreme-ultraviolet-initiated High-harmonic Generation in Ar${}^{+}$
• Spectral caustics of high-order harmonics in one-dimensional periodic crystals
• Exploring symmetries in photoelectron holography with two-color linearly polarized fields
• On the Cooper Minimum in Singly ionized and Neutral Argon
• Ellipticity Dependence of Excitation and Ionization of Argon Atoms by Short-Pulse Infrared Radiation
• High-Harmonic Generation in the Water Window from mid-IR Laser Sources