Multiscale modelling of HHG and its applications for phase-matching optimisation

International audienceWe present a multiscale approach to model high-harmonic generation in gaseous media. Such a treatment is indispensable for a quantitive description of phenomena emerging from the interplay of the microscopic response of a single microscopic emitter, and the macroscopic profile of the driving beam propagating in a generating medium. In particular, we address phase-matching controlled by pre-ionising the medium