Abstract
Nonlinear interaction between femtosecond laser pulse and simple dielectric solid, silicon, at an intensity range around the damage threshold has been investigated by first-principles calculations based on time-dependent density functional theory (TDDFT). Intensity and frequency dependences are discussed making comparison with the Keldysh theory.
Highlights
Light-matter interaction in an intensity range around the damage threshold has been actively and successfully explored by experimental studies aiming for ultrafast control of electron dynamics and non-thermal laser processing, while theoretical description of this area has not been well developed due to highly nonlinear and complex nature of the interaction
A recently developed first-principles computational method, time-dependent density functional theory (TDDFT), can be another powerful tool to be able to describe highly nonlinear interactions between high-intensity laser pulses and electrons in various matters with less approximations and without empirical parameters as long as the functional adopted in the calculation does not include parameters for a specific purpose
We present an analysis for the energy transfer from a pulsed electric field to electrons in a unit cell of a representative simple crystalline solid, silicon, using TDDFT
Summary
Light-matter interaction in an intensity range around the damage threshold has been actively and successfully explored by experimental studies aiming for ultrafast control of electron dynamics and non-thermal laser processing, while theoretical description of this area has not been well developed due to highly nonlinear and complex nature of the interaction. A recently developed first-principles computational method, time-dependent density functional theory (TDDFT), can be another powerful tool to be able to describe highly nonlinear interactions between high-intensity laser pulses and electrons in various matters with less approximations and without empirical parameters as long as the functional adopted in the calculation does not include parameters for a specific purpose.
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