Coherent Phonon Dynamics in 2D van der Waals Semiconductors

Coherent phonon dynamics in two-dimensional (2D) van der Waals semiconductors represent an emergent frontier for controlling quantum states, energy transport, and optoelectronic functionalities through synchronized lattice vibrations. This comprehensive review synthesizes fundamental generation mechanisms, advanced ultrafast spectroscopy techniques, and material-specific manifestations across transition metal dichalcogenides (TMDs), magnetic semiconductors, perovskites, and related quantum materials. We establish how tailored phonon coherence enables unprecedented manipulation of electronic, optical, and spin states while highlighting persistent knowledge gaps and future research vectors for phonon-engineered quantum technologies.