Formation of a carbon nanofilm on oil-coated KU-1 glass annealed by KrF laser radiation

The annealing of an oil layer on the output face of a KU-1 glass substrate in air by a high-power 80 ns KrF laser pulse is studied. A polymer-like hydrocarbon film up to 40 nm thick is found to form at laser radiation fluences F above 2 J cm^-2 on the glass surface. The upper limit of F ≈ 6 J cm^-2 is determined by the damage of the glass samples whose size is approximately equal to the laser spot diameter (1 cm).