T. Siegel

TL;DR: This work demonstrates control of short and long quantum trajectories in high harmonic emission through the use of an orthogonally polarized two-color field using a drive field from a femtosecond laser to control the relative phase ϕ between the two fields.

TL;DR: In this article, the authors used a mid-infrared (mid-IR) laser at $1300$ nm to study the region of the harmonic spectrum containing such interferences.

TL;DR: In this article, the authors present theoretical investigations of high-order-harmonic generation (HHG) resulting from the interaction of noble gases with localized surface plasmons and demonstrate that the strong nonhomogeneity of this laser field plays an important role in the HHG process and leads to a significant increase of the harmonic-cutoff energy.

TL;DR: In this article, the ability of few-cycle mid-infrared intense laser pulses to produce extended harmonic spectra (≥45 eV) suitable for high harmonic spectroscopy in aligned hydrocarbons with ionization potentials in the range 9.07-11.52 eV was demonstrated.

TL;DR: Using a laser at 1300 nm, this work is able to extend the technique to molecules with relatively low ionization potentials, observing wide harmonic spectra reaching up to 60 eV, which improves spatial resolution of the high harmonic spectroscopy to the point where interference minima in harmon spectra of N( 2)O and C(2)H(2), can be observed.