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Journal of nanoscience and nanotechnology

Local field effect on the photoluminescent spectra of Eu3+ ions in glass.


PMID 24738390

Abstract

To investigate the effect of the dielectric medium on the spontaneous emission rate of an isolated emitter, two series of glass samples of various compositions lightly doped with the Eu3+ ion were prepared by melt-quenching method. According to the enhancement factors for emission rates due to the refractive index of the dielectric medium, we qualitatively analyzed the intensities of the electric dipole and magnetic dipole transitions by comparing the emission spectra of the samples with different compositions, viz. various refractive indices. This preliminary result indicates that the local-field effect on the spontaneous emission rates follows the virtual-cavity model, which is derived by assuming that single-ion emitters enter the medium without disturbing the medium, i.e., as interstitial ions or by replacing host ions of low polarizability.