Postprint version. Published in Physical Review A, Volume 59, Issue 6, June 1, 1999, pages R4117-R4120.
NOTE: At the time of publication, the author Thomas Bensky was not yet affiliated with Cal Poly.
The definitive version is available at https://doi.org/10.1103/PhysRevA.59.R4117.
Picosecond laser pulses have been used to produce Rydberg wave packets in calcium atoms in the presence of a strong static electric field. The dynamics of the Stark wave packets have been observed by measuring the momentum-space probability distribution as a function of time. The full precession of the electronic orbital angular momentum, the appearance of a large-amplitude, linear oscillation of the electronic dipole moment, and a pronounced, periodic up-down asymmetry in the momentum distribution are all observed directly.