Steady-state, time-resolved and polarization-resolved fluorescence stu
dies of glasses doped with acridine orange with concentrations near 10
(-3) M/L are reported. It was found that at this concentration a notic
eable part of dye molecules exists in the form of dimers. By means of
a polarization-resolved spectroscopic technique the structure of dimer
s was found to be consistent with the simple exciton theory.