The radiative lifetime of an emitter (such as a luminescent ion) is affected not only by the properties of the emitter itself but also by the dielectric properties of the surrounding media. The fluctuation of the local electrical field caused by random distribution of polarized luminescent-ion-containing nanoparticles in media leads to the fluctuation of radiative lifetime of luminescent ions. Lifetime fluctuation has been calculated analytically by considering this effect. The results show that the fluctuation of radiative lifetime is not negligible and can be shown and observed in future experiments.
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