Local field effects on the radiative lifetimes of Ce$^{3+}$ in different hosts

Details Local field effects on the radiative lifetimes of Ce$^{3+}$ in different hosts Local field effects on the radiative lifetimes of Ce$^{3+}$ in different hosts

2005-05-24

arxiv.org/abs/quant-ph/0505182v1

Physics

Quantum Physics

9pages, 1 figures, presented on AMN-2 and to appear on Current Applied Physics

Scientific paper

10.1016/j.cap.2005.11.016

For emitters embedded in media of various refractive indices, different theoretical models predicted substantially different dependencies of the spontaneous emission lifetime on refractive index. It has been claimed that various measurements on $4f\to 4f$ radiative transition of Eu$^{3+}$ in hosts with variable refractive index appear to favor the real-cavity model [J. Fluoresc. 13, 201 (2003) and references therein, Phys. Rev. Lett. 91, 203903 (2003)]. We notice that $5d\to 4f$ radiative transition of rare-earth ions, dominated by allowed electric-dipole transitions with line strengths less perturbed by the ligands, serves as a better test of different models. We analyze the lifetimes of $5d\to 4f$ transition of Ce$^{3+}$ in hosts of refractive indices varying from 1.4 to 2.2. The results favor the macroscopic virtual-cavity model based on Lorentz local field [J. Fluoresc. 13, 201 (2003)].

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