Full text loading...
Diagram of relevant energy levels of the donor-acceptor pair of the same nature. The pulsed excitation transitions of intensity and the intraionic decays from the intermediate and upconversion states (with rates and ), respectively, are shown as solid arrows. The energy transfers, with rates or , depending on the direction or , respectively, are shown by dotted arrows.
Semilogarithmic plots for the variation in time of the intermediate state average probability, , to several concentrations. The solid straight line corresponds to an optical density of , while the curves of segments correspond to concentrations , , and with decrease of the segment longitude, respectively. All these cases utilize the values , , and , where and .
Semilogarithmic plots for variation in time of intermediate state population, , with several initially excited ion fractions (intensities of external excitation). The solid straight line corresponds to , while the curves of segments correspond to , , and with decrease of the segment longitude, respectively. All these cases utilize the values , , and , where and .
Semilogarithmic plots for Eqs. (16) (segmented curves) and (23) (, solid curve) at early moments. Both equations have been multiplied by optical density, , accounting on the temporal population in time, . The curve of longer segments corresponds to , and that of shorter ones to . All cases utilize , , , , and .
Examples of the variation in time of the macroscopic energy transfer rate, [Eq. (20)] with the change of : (shorter segment curve), (longer segment curve), and (solid curve). In all the curves have been utilized the values , , , , and .
Temporal variation of the upconverted state population, for the , , , , , , and values.
Article metrics loading...