Excited‐State Dynamics and Optical Properties of Silica Under Ultrafast Laser Irradiation

• Published in: Advanced Physics Research Vol. 4; no. 2
• Main Authors: Tsaturyan, Arshak A., Kachan, Elena, Stoian, Razvan, Colombier, Jean‐Philippe
• Format: Journal Article
• Language: English
• Published: Edinburgh John Wiley & Sons, Inc 01.02.2025; Wiley; Wiley-VCH
• Subjects: ab initio molecular dynamics; Absorption spectra; Approximation; Atomic structure; Band structure of solids; BSE; Density functional theory; Electrons; Energy; Energy gap; Excitation; First principles; Free electrons; Fused silica; Ionization; Irradiation; laser excitation; Lasers; Molecular dynamics; Nonequilibrium conditions; Optical properties; Physics; Semiconductors; Silica; Silica glass; Simulation; Structural behavior; Ultrafast lasers

Excited by intense infrared ultrafast light pulses, a wide bandgap material undergoes nonlinear ionization, generating a high density of free electrons in conduction states. As a result, the electronic band structure is critically modified and the bandgap shrinks. This induces rapid changes in optic...