Mechanisms of Ultrafast Laser-Material Interaction

This research systematically investigates the fundamental physics of femtosecond/picosecond laser interaction with various materials, including metals, semiconductors, and dielectrics. It explores the multi-scale dynamic mechanisms spanning the entire process from photon absorption, electron excitation, and electron-phonon coupling to heat conduction, phase transitions, and material removal. A key focus is revealing the intrinsic relationships between laser parameters (wavelength, pulse duration, fluence, repetition rate, etc.) and material responses (threshold behavior, heat-affected zone, structural transformation). By integrating theoretical modeling with experimental validation, this research establishes the theoretical foundation for process optimization and control in ultrafast laser precision machining.