Abstract
The excitation power dependences of the luminescence polarization degree and of the anisotropy of the stimulated emission from glycerin solutions of rhodamine 6G at different dye concentrations have been obtained experimentally. It is shown that the anisotropy of the stimulated emission is determined by the dichroism of induced absorption in the range of low concentrations and by the development of excitation-energy migration into the generation channel. The complex character of the behavior of the fluorescence polarization degree is explained by the competition between several processes of excitation-energy transformation — nonradiative energy transfer and directed energy transfer to excimers with an increase in the dye concentration and in the excitation power.
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