This diagram represents
a technique for storing the information about a light pulse in a collection
of gas atoms. Panel 1: a laser beam prepares a set of rubidium atoms
as a light pulse approaches. Panel 2: the light pulse interacts with
the rubidium atoms. Panel 3: the laser beam is off and the light pulse
has disappeared, leaving an impression in the atoms. Panel 4: the
laser beam is turned back on, which reconstitutes the light pulse.
Panel 5: the light pulse exits.
TRN January 24, 2001