Unusually fast energy transfer in solid state crystals and glasses

Stanley R. Rotman; O. Maoz; Arnon Shlomi; F. Kaczelnik; Y. Felus; Aryeh M. Weiss; Renata Reisfeld; Marek Eyal; F. X. Hartmann

doi:10.1117/12.49062

1 April 1991 Unusually fast energy transfer in solid state crystals and glasses

Stanley R. Rotman, O. Maoz, Arnon Shlomi, F. Kaczelnik, Y. Felus, Aryeh M. Weiss, Renata Reisfeld, Marek Eyal, F. X. Hartmann

Author Affiliations +

Proceedings Volume 1442, 7th Mtg in Israel on Optical Engineering; (1991) https://doi.org/10.1117/12.49062
Event: 7th Meeting of Optical Engineering in Israel, 1990, Tel-Aviv, Israel

Abstract

The laser performance of rare earth doped crystals and glasses can be significantly improved by codoping with an addiontal ion which absorbs the pump light and efficiently transfers the energy to the lasing rare earth ion. Such methods have been used in chromium-neodymium doped gadolinium scandium gallium garnets, glasses and glass ceramics, and manganese-thulium doped lead zinc gallium fluoride glasses. Energy transfer between donors and acceptors in such materials has been traditionally modeled by the Foerster-Dexter equation. However, it has been found recently that an anomalous energy transfer can occur at very short times inconsistent with the above model. We propose that such transfer can occur due to two additional causes: 1 . the physical pairing of donors and acceptors in the materials and 2. additional short-range interactions which noticeably increase the transfer rate between donors and acceptors. Models for both these cases are presented and compared with experimental results.

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Stanley R. Rotman, O. Maoz, Arnon Shlomi, F. Kaczelnik, Y. Felus, Aryeh M. Weiss, Renata Reisfeld, Marek Eyal, and F. X. Hartmann "Unusually fast energy transfer in solid state crystals and glasses", Proc. SPIE 1442, 7th Mtg in Israel on Optical Engineering, (1 April 1991); https://doi.org/10.1117/12.49062

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