Title of article :
Local field effects on the radiative lifetimes of Ce3+ in different hosts
Author/Authors :
Duan، نويسنده , , Chang-Kui and Reid، نويسنده , , Michael F.، نويسنده ,
Issue Information :
دوماهنامه با شماره پیاپی سال 2006
Abstract :
For emitters embedded in media of various refractive indices, different theoretical models predict substantially different dependencies of the spontaneous emission lifetime on the refractive index. It has been claimed that various measurements of 4f → 4f radiative lifetimes of Eu3+ in hosts with variable refractive index appear to favor the real-cavity model [D. Toptygin, J. Fluoresc. 13 (2003) 201 and references therein; G.M. Kumar, D.N. Rao, Phys. Rev. Lett. 91(2003) 203903]. The 5d → 4f radiative transition of rare-earth ions are dominated by allowed electric dipole transitions with line strengths less perturbed by the ligands. These transitions therefore serve as a better test of the different models. We analyze the lifetimes of the 5d → 4f transition of Ce3+ in hosts of refractive indices varying from 1.4 to 2.2. The results favor the macroscopic virtual-cavity model based on the Lorentz local field [D. Toptygin, J. Fluoresc. 13 (2003) 201].
Keywords :
Local-field effect , Radiative lifetime , Ce3+ , 5d–4f transition
Journal title :
Current Applied Physics
Journal title :
Current Applied Physics