Coherent, directional, laserlike emission from random gain media.
We present experimental evidence for coherent, directional emission from a random gain medium above the threshold for laserlike emission. In particular, we report the first observation (to our knowledge) of a coherent angular backscattering peak above this threshold. A plausible explanation of our findings follows from the assumption that superfluorescent emission occurs in the gain medium above threshold.
Shukri
M
M
Department of Physics, Box 3D, New Mexico State University, Las Cruces, New Mexico 88003, USA.
Armstrong
R L
RL