We consider the propagation in a dielectric medium of radiation emitted by
a single-atom source. The source and dielectric atoms are assumed to be two
-state systems, and the emitted light is incident on an ideal broadband det
ector. It is shown that the peak probability for producing a "click" at the
detector can occur sooner than it could if there were no material medium b
etween it and the source atom. (C) 2001 Optical Society of America.