Infrared-to-green upconversion luminescence and mechanism of Ho3+, Nd3+ and Yb3+ ions in oxyfluoride glass ceramics
Zhang Jun-Jie (张军杰)a, Kawamoto Yojib, Dai Shi-Xun(戴世勋)a
a Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; b Department of Chemistry, Faculty of Science, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan
Abstract New oxyfluoride glasses and glass ceramics co-doped with Nd$^{3+}$, Yb$^{3+}$ and Ho$^{3+}$ were prepared. The upconversion of infrared radiation into green fluorescence has been studied for Nd$^{3+}$, Yb$^{3+}$ and Ho$^{3+}$ in the transparent oxyfluoride glass ceramics. At room temperature very strong green upconversion luminescence due to the Ho$^{3+}$: ($^5$F$_4$, $^5$S$_2$)→$^5$I$_8$ transition under 800 nm excitation was observed in the glass ceramics. The intensity of the green upconversion luminescence in a 1mol% YbF$_3$-containing glass ceramic was found to be about 120 times stronger than that in the precursor oxyfluoride glass. The reason for the highly efficient Ho$^{3+}$ upconversion luminescence in the oxyfluoride glass ceramics is discussed. The upconversion mechanism is also investigated.
Received: 21 November 2003
Revised: 16 January 2004
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No 60207006), and by the Optical Science and Technology of Shanghai (Grant No 022261046).
Cite this article:
Zhang Jun-Jie (张军杰), Kawamoto Yoji, Dai Shi-Xun(戴世勋) Infrared-to-green upconversion luminescence and mechanism of Ho3+, Nd3+ and Yb3+ ions in oxyfluoride glass ceramics 2004 Chinese Physics 13 1156
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