Fluorescence intensity ratio thermometer methodology of eliminating the "decoupling" effect of a pair of thermally coupled energy levels of rare-earth ions

Feng Qin, Hua Zhao, Moyang Lv, Wei Cai, Zhiguo Zhang, Wenwu Cao

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

By separating the thermal and nonradiative relaxation population, the fluorescence intensity ratio (FIR) of a pair of thermally coupled energy levels of rare-earth ion is reformulated. For a pair of thermally coupled levels, if the ratio of the thermal population in the upper level to the total population of the lower level abides by the Boltzmann distribution law, the general FIR would be modulated by the proportion of the total population to the thermal population in the upper level. By defining the reciprocal of the proportion as the thermal population degree (η), the product ηFIR will follow the pure Boltzmann distribution law. Considering the fluorescent transient process, the η values may be obtained from the weights of the fluorescent dynamic components of the upper level. A method to calculate this η factor is presented.

Original languageEnglish (US)
Pages (from-to)1401-1403
Number of pages3
JournalOptics Letters
Volume42
Issue number7
DOIs
StatePublished - Apr 1 2017

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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