Modelling and experiments of self-reflectivity under femtosecond ablation conditions

Abstract

We present a numerical model which describes the propagation of a single femtosecond laser pulse in a medium of which the optical properties dynamically change within the duration of the pulse. We use a Finite Difference Time Domain (FDTD) method to solve the Maxwell's equations coupled to equations describing the changes in the material properties. We use the model to simulate the self-reflectivity of strongly focused femtosecond laser pulses on silicon and gold under laser ablation condition. We compare the simulations to experimental results and find excellent agreement.

11 pages, 8 figures

References in corpus (2)

• Free-electron properties of metals under ultrafast laser-induced electron-phonon nonequilibrium: A first-principles study
• Femtosecond laser nanostructuring in glass with sub-50nm feature sizes

Cited by in corpus (2)

• Wavelength-dependent reflectivity changes on gold at elevated electronic temperatures
• Dynamics of Ultrafast Laser Ablation of Water