Exciton state Excitons 3 Excitonic state 2 Harmonic generation 2 Nonlinear optics 2 Transition metals 2 Angular diagram 1 Binding energy 1 Coherent coupling 1 Copper oxides 1 Crystal symmetry 1 Density matrix 1 Dichalcogenides 1 Dynamics 1 Electronic structure 1 Electronic.structure 1 Environment effects 1 Even parity 1 Exciton-binding energy 1 High resolution 1 Monolayers 1 Nanosecond pulse 1 Nanosecond spectroscopy 1 Nonlinear equations 1 Nonlinear signals 1 Nonlinear spectroscopy 1 Particle beams 1 Photoemission 1 Photoemission intensity 1 Photoemission spectrum 1