We analyze the random process of fluorescence reabsorption and trapping in solid-state optical materials in general and its influence on the efficiency of optical cooling of solids by anti-Stokes fluorescence in particular. Using the absorption and fluorescence spectra of Yb3+:ZrF4-BaF2-LaF3-AlF3-NaF (ZBLAN) as input data, we employ a random-walk model to test analytical approximations of the fluorescence escape efficiency and cooling efficiency, including reflections at the boundary.
© 2005 Optical Society of America
Bauke Heeg, Peter A. DeBarber, and Garry Rumbles, "Influence of fluorescence reabsorption and trapping on solid-state optical cooling," Appl. Opt. 44, 3117-3124 (2005)