STOCHASTIC-THEORY OF MOLECULAR RADIATIVE TRANSPORT

The radiative transport (or radiative migration) of electronic excitat ion energy in a molecular ensemble is analyzed from a stochastic point of view. This approach yields results considerably more general than those of previous treatments, where successive hops are (implicitly) a ssumed to be uncorrelated, while they constitute in fact a Markov proc ess. The time evolution of the fluorescence intensity emitted by the m olecular ensemble, in response to excitation by an external beam of li nearly polarized and essentially monochromatic light is obtained. In c ontrast to the previous treatments, only known parameters are required . The time evolution of the fluorescence anisotropy is also obtained f or the first time. (C) 1995 American Institute of Physics.