Broadband downconversion based infrared quantum cutting by cooperative energy transfer from Eu2+ to Yb3+ in glasses

Jiajia Zhou; Yixi Zhuang; Song Ye; Yu Teng; Geng Lin; Bin Zhu; Junhua Xie; Jianrong Qiu
October 2009
Applied Physics Letters;10/5/2009, Vol. 95 Issue 14, p141101
Academic Journal
Near-infrared quantum cutting involving the emission of near-infrared photons by downconversion cooperative energy transfer from Eu2+ to Yb3+ in borate glasses was reported. Electron spin resonance spectra and absorption spectra were measured to prove the existence of Eu2+ in borate glasses. Excitation, emission, and fluorescence decay measurements were performed to examine the occurrence of cooperative energy transfer from Eu2+ to Yb3+ ions. Yb3+ concentration dependent quantum efficiency was calculated and the maximum efficiency approaches 164.19%.


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