Generation of high-energy attosecond pulses by the relativistic-irradiance short laser pulse interacting with a thin foil

When a thin foil target is irradiated by two laser pulses, or it is irradiated by one pulse under the condition when the charge separation electric field exceeds the laser field, the electron motion in the direction perpendicular to the target surface is suppressed. Electrons can only slide along the foil. Using an analytical model, we describe the new regime of attosecond pulse generation by the relativistic-irradiance short laser pulse interacting with the sliding mirror. Pulses with the duration of few hundred attoseconds can be generated with the conversion efficiency up to few percents.