Electron-lattice kinetics of metals heated by ultrashort laser pulses |
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Authors: | L A Falkovsky E G Mishchenko |
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Institution: | (1) Landau Institute for Theoretical Physics, Russian Academy of Sciences, 117334 Moscow, Russia |
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Abstract: | We propose a kinetic model of transient nonequilibrium phenomena in metals exposed to ultrashort laser pulses when heated
electrons affect the lattice through direct electron-phonon interaction. This model describes the destruction of a metal under
intense laser pumping. We derive the system of equations for the metal, which consists of hot electrons and a cold lattice.
Hot electrons are described with the help of the Boltzmann equation and equation of thermoconductivity. We use the equations
of motion for lattice displacements with the electron force included. The lattice deformation is estimated immediately after
the laser pulse up to the time of electron temperature relaxation. An estimate shows that the ablation regime can be achieved.
Zh. éksp. Teor. Fiz. 115, 149–157 (January 1999)
Published in English in the original Russian journal. Reproduced here with stylistic changes by the Translation Editor. |
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