There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.
Abstract
The precise observation of the angle-frequency spectrum of light filaments in water
reveals a scenario incompatible with current models of conical emission (CE). Its
description in terms of linear X-wave modes leads us to understand filamentation dynamics
requiring a phase- and group-matched, Kerr-driven four-wave-mixing process that involves
two highly localized pumps and two X-waves. CE and temporal splitting arise naturally
as two manifestations of this process.