Generation of attosecond pulse trains during the reflection of a very intense laser on a solid surface

摘要

The normal-incidence reflectivity of a plasma generated on a solid surface by a very intense laser field is studied. We demonstrate that the reflected field has the form of trains of subfemtosecond pulses under suitable conditions. Particle-in-cell computations are presented and compared with a naive moving-mirror model. The physical origin of this behavior is discussed in terms of the relativistic motion of the electron plasma. (C) 1998 Optical Society of America. [References: 26]