Page "Light" Paragraph 10

As an extreme example of the nature of light-slowing in matter, two independent teams of physicists were able to bring light to a " complete standstill " by passing it through a Bose-Einstein Condensate of the element rubidium, one team at Harvard University and the Rowland Institute for Science in Cambridge, Mass., and the other at the Harvard-Smithsonian Center for Astrophysics, also in Cambridge.

However, the popular description of light being " stopped " in these experiments refers only to light being stored in the excited states of atoms, then re-emitted at an arbitrary later time, as stimulated by a second laser pulse.

During the time it had " stopped " it had ceased to be light.