- Conference date: 18–22 April 2010
- Location: Santa Fe, (New Mexico)
The modeling of laser‐excited dielectric materials requires a detailed description of the electronic excitation. Dielectric materials do not absorb visible light by traditional linear absorption, so the dynamical generation of conduction‐band electrons strongly couples to the absorption. The generation of free electrons is initiated by strong‐field excitation and followed by multiplication through impact ionization by energetic electrons heated by the laser. The present paper describes an approach to solving the coupled problem of electron excitation and one‐dimensional light propagation. The electronic excitation is described in the so‐called multiple‐rate‐equation model, and the light is absorbed by a combination of strong‐field excitation and linear absorption by the excited electrons, which are assumed to behave as a free‐electron gas described by a Drude model. The model is generic and based on a few key parameters: the wavelength and the pulse duration of the light, and the band gap of the dielectric medium. This allows parametric investigations of ablation phenomena.
- Dielectric materials
- Carrier generation
- Free electron lasers
- Conduction electrons
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