Only a few years after the first generation of single isolated attosecond pulses of
extreme ultraviolet light, these pulses can be produced routinely. First applications are
investigations of light and matter in which ultrafast processes are being time-resolved.
The direct measurement of the electric field of an ultrashort light pulse as well as the
time-resolved observation of a photoionization process in a gas or on a solid surfce show
the potential of attosecond physics.