Abstract: This habilitation thesis outlines a research career dedicated to the development of attosecond spectroscopy and its application to the study of electron dynamics in solids. Following a PhD at CEA Saclay focused on controlling optical angular momentum during high-harmonic generation, the author shifted their research toward attosecond transient absorption and reflectivity spectroscopy applied to materials. The manuscript is structured around three complementary themes: the methodological development of these spectroscopic techniques and their experimental implementation; the observation of electron and spin dynamics on timescales of a few femtoseconds or less; and the design of novel spectroscopic approaches—such as phase-resolved attosecond spectroscopy, grazing-incidence diffraction, and attosecond magnetic circular dichroism—that provide access to new observables. The manuscript concludes with an overview of ongoing work and future prospects, particularly regarding next-generation laser sources, the study of two-dimensional materials, spin dynamics, and strongly correlated solids.
Composition of the Jury :
- HALTE-FILIPPI Valérie, Professeur de l’Université de Strasbourg, Institut de Physique et Chimie des Matériaux de Strasbourg
- LUCCHINI Matteo, Professeur Associé au Politecnico de Milano, Département de Physique
- RUELLO Pascal, Professeur à Le Mans Université, Institut des Molécules et Matériaux du Mans
- MARSI Marino, Professeur de l’Université Paris-Saclay, Laboratoire de Physique des Solides
- PASTOR Ernest, Chaire Professeur Junior CNRS, Institut de Physique de Rennes
