I guess I'm dense, but I don't see anything in this indicating that light
was "stopped" or "stored", any more than a tape recorder "stops and stores"
sound. In both cases
   1) The incoming energy is recorded onto a storage medium
   2) In the process of 1), the incoming energy is absorbed/destroyed
   3) The recorded information is later retrieved by application of
additional energy to the storage medium.

Or perhaps charging a battery is a better analogue: absorption/destruction
of the incoming energy causes a change in state of the medium from a state
of lower "potential" (in this case electrochemical rather than electron
excitation) to a higher-potential state, and the energy is later retrieved
by causing the medium to revert to the lower-potential state. I don't think
any of us think of a battery as a box containing a bunch of little "stopped
electricity blobs" that we can let out when we want them.