Electronic movies

摘要

Strong laser fields can tear an electron away from a molecule, leaving a hole in the electronic wavef unction that races through the molecule. The ultrafast motion of such a hole has been traced at last.rnThe first event in a light-induced reaction is that the electrons in the irradiated molecule respond to the incident light. This response occurs on attosecond timescales (1 attosecond is 10~(18) seconds), and even the fastest time-resolved measurements have been unable to probe the dynamics of the process.