The energy transfer mechanisms between Er3+ and Yb3+ ions have been investigated in LiLa9(SiO4)6O2 under selective Er3+ excitation. IR emission spectra, measured in the CW excitation regime, were used to establish a relationship between the macroscopic transfer and back transfer parameters. These measurements were combined with the results obtained under pulsed excitation to quantify the absolute values of transfer (Yb3+ Er3+) and back transfer coefficients (Er3+ Yb3+), C25 = 9.5 × 10?17 cm3s?1 and C52 = 1.4 × 10?17 cm3s?1, respectively. Additionally, it has been observed an energy transfer that reduces the quantum efficiency of the green emitting Er3+ levels. The corresponding macroscopic coefficient has been also determined (CGQ = 6.1 × 10?17 cm3s?1). © 2014 Optical Society of America.
Quantification of energy transfer processes in LiLa9(SiO4)6O2:Er3+/Yb3+ under selective Er3+excitation
BETTINELLI, Marco Giovanni;PICCINELLI, FABIO;
2014-01-01
Abstract
The energy transfer mechanisms between Er3+ and Yb3+ ions have been investigated in LiLa9(SiO4)6O2 under selective Er3+ excitation. IR emission spectra, measured in the CW excitation regime, were used to establish a relationship between the macroscopic transfer and back transfer parameters. These measurements were combined with the results obtained under pulsed excitation to quantify the absolute values of transfer (Yb3+ Er3+) and back transfer coefficients (Er3+ Yb3+), C25 = 9.5 × 10?17 cm3s?1 and C52 = 1.4 × 10?17 cm3s?1, respectively. Additionally, it has been observed an energy transfer that reduces the quantum efficiency of the green emitting Er3+ levels. The corresponding macroscopic coefficient has been also determined (CGQ = 6.1 × 10?17 cm3s?1). © 2014 Optical Society of America.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
