Andrey Gandman

TL;DR: Attosecond extreme ultraviolet (XUV) spectroscopy is used to resolve the electron transfer from valence to conduction band states in semiconductors, and distinguished the electron dynamics—which proceed faster than a quadrillionth of a second after laser excitation—from the comparatively slower lattice motion of the silicon atomic nuclei.

TL;DR: The simultaneous observation of electrons and hole dynamics in germanium nanocrystalline thin films with extreme ultraviolet transient absorption spectroscopy paves the way for investigating few- to sub-femtosecond dynamics of both holes and electrons in complex semiconductor materials and across junctions.

TL;DR: In this article, coherent phase control of resonance mediated three-photon absorption in Na was studied both theoretically and experimentally, and the regime is perturbative of third order.

TL;DR: The simultaneous direct and energy-resolved probing of ultrafast electron and hole dynamics in a silicon-germanium alloy with the stoichiometry Si0.25Ge0.75 opens a route to study carrier dynamics in more complex materials with femtosecond and sub-femtosed temporal resolution.

TL;DR: A new scheme for extended multichannel selective femtosecond coherent control based on symmetry properties of the excitation channels is presented and implemented, where an atomic nonresonant two-photon absorption channel is coherently incorporated in a resonance-mediated (2+1) three-ph photon absorption channel.