<title>Mechanism of thin layer damage due to collision of laser-induced near-surface shock waves</title>

Abstract

The problem of laser induced damage for thin layer on surface of condensed medium is considered. Specific mechanism of the damage at the place between light absorbing inhomogeneities is discussed in terms of irradiated collision of shock waves induced by micro explosions of the irradiated inhomogeneities. Collision of shock waves stimulates air ionization and absorption for laser irradiation. The process could lead to microexplosion far from initial microexplosions. Models for the phenomena includes: (1) estimation of shock wave parameters form single microexplosion; (2) thermodynamics parameters of air inside region of two shock wave collision; (3) estimation of layer damage.