Article
Photon avalanche effect in LaCl 3 : Pr 3 +
Physical Review B
(2000)
Abstract
The phenomenon of photon avalanche, which involves both an excited state absorption process from a metastable level and a cross relaxation energy transfer process responsible for the large increases in population of this metastable level, has been investigated in LaCl3:Pr3+. In this paper, we report on the intensity dependence of both the steady-state fluorescence and the temporal evolution of the avalanche signal as a function of temperature (80 K to room temperature). Comparisons are made between experimental results and mathematical models based on a six-level system described by a series of coupled rate equations combined with the propagation of a Gaussian beam. We develop a model with only one adjustable parameter, the excited state absorption cross section, which provides a good description of all of our experimental data. We have estimated values of the excited state absorption cross section for the various 3−→H53P0 pumping transitions at different temperatures.
Disciplines
Publication Date
October 15, 2000
DOI
10.1103/PhysRevB.62.10790
Publisher Statement
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Citation Information
Delena Bell Gatch, W. M. Dennis and William M. Yen. "Photon avalanche effect in LaCl 3 : Pr 3 +" Physical Review B Vol. 62 Iss. 16 (2000) p. 10790 - 10796 ISSN: 2469-9969 Available at: http://works.bepress.com/delena_gatch/144/