  In this paper the Boltzmann transport equation for thermal processes induced
by ultra-short laser pulses is formulated and solved. For thermal process where
the duration of the laser pulse (femtoseconds - attoseconds) is shorter than
the relaxation time, the solution of Boltzmann equation differs from the
solution of the Fourier equation. In this paper the formula for density current
of the heat carrier is obtained. It is shown that for thin one-dimensional
structures the current strongly depends on the scattering mechanism of the heat
carriers. Key words: Boltzmann equation; Ultra-short laser pulses;
Nonhomogenous materials.

Materials Science