Modeling Ultrafast Laser Excitation of Fused Silica Using Hybrid Dielectric Response and Two-Temperature Model

Researchers have developed a new model to simulate the effects of ultrafast laser excitation on fused silica. This model integrates a hybrid Lorentz-Drude dielectric response with a density-dependent two-temperature model. The hybrid approach combines the strengths of both the Lorentz and Drude models to accurately describe the dielectric properties of fused silica under intense laser irradiation. The two-temperature model accounts for the distinct temperatures of electrons and the lattice, and its density-dependent nature allows for more precise simulations as material properties change during excitation. This advanced modeling technique aims to provide a deeper understanding of the fundamental processes occurring in fused silica when subjected to high-intensity, short-duration laser pulses. Such insights are crucial for applications in laser material processing, optical device fabrication, and fundamental materials science research. The model's ability to capture the complex interplay between electronic and thermal responses is expected to improve predictive capabilities for laser-induced modifications in silica-based materials.