We are excited to see our latest paper on “Signatures of multi-band effects in high-harmonic generation in monolayer molybdenum disulfide” appear in Physical Review Letters. In this joint experimental and theoretical work on solid-state high-harmonic generation (HHG), we illustrate that the polarization properties of the harmonics encode not only the dynamical symmetry properties of the crystal and laser field system, but also material-specific properties such as the vectorial character of the transition dipole moments from different valence-conduction-band pairs. Importantly, we conduct experiments on monolayer materials which enables us to show that angular spectral shifts of the harmonic emission stem from multiband contributions instead of bulk propagation effects.

This work was done in collaboration with researchers from the Louisiana State University, Friedrich Schiller University Jena, and Yale University.

Our open access paper is now published in Physical Review Letters:
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.129.147401