Stochastic models of intermediate state interaction in second order optical processes
The stochastic theory of spectral line shape as developed by one of the present authors is here extended to the problem of intermediate state interaction in a second order optical process. Depending on the stochastic nature of the interaction, the process may appear as a pure Raman process, or a luminescent process, or a mixed process. Simple but standard models are 1) the adiabatic random modulation and 2) the off-diagonal random modulation of the intermediate states. Limiting cases of slow and fast modulation are discussed in a general way. Some model calculations are made in order to see how a spectrum changes its nature from one limit to another.
KeywordsOrder Process Fast Modulation Slow Modulation Stochastic Theory Incident Photon Energy
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