Abstract
We have measured the absorption of 1-ps laser pulses interacting with matter at intensities from to W/. The variations of absorption with incidence angle and polarization have been used to infer submicron plasma-density-gradient scale lengths. The results show a transition between a regime of laser interaction with sharply bounded dense cold matter ( W/), where absorption is by the usual skin depth effect, to a regime of interaction with a plasma of very steep density gradient () ().
- Received 25 October 1988
DOI:https://doi.org/10.1103/PhysRevLett.62.760
©1989 American Physical Society