Compositional dependences on the mechanism of upconversion in Nd3+/Tm3+ co-doped chalcohalide glasses

Abstract Mechanisms of the compositional dependence of blue emission from Nd 3+ /Tm 3+ co-doped Ge–Ga–S–CsBr chalcohalide glasses were investigated. The blue upconversion emissions (centered at 475 nm) due to the Tm 3+ : 1 G 4  →  3 H 6 transition decreased as the CsBr/Ga ratio in glasses while the other upconversion emissions from the Nd 3+ ions increased. Changes in the local environment of rare-earth ions incurred by the CsBr addition significantly increased the excited state absorption within Nd 3+ ions. This resulted in the decrease in the Nd 3+  → Tm 3+ energy transfer rates that led to the large decrease in blue upconversion emission.

[1]  D. Shepherd,et al.  Efficient blue upconversion emission due to confined radiative energy transfer in Tm3+:Nd3+ co-doped Ta2O5 waveguides under infrared-laser excitation , 2008 .

[2]  A. Patra,et al.  Red to blue tunable upconversion in Tm3+-doped ZrO2 nanocrystals. , 2005, The journal of physical chemistry. B.

[3]  F. Su,et al.  Energy transfer and sensitization blue-upconversion in Tm3+ /Yb3+ co-doped tellurite glasses , 2007 .

[4]  Abdolnasser Zakery,et al.  Optical properties and applications of chalcogenide glasses: a review , 2003 .

[5]  A. Jha,et al.  The structural aspects of the solubility of Pr3+ ions in GeS2-based glasses , 1997 .

[6]  W. J. Chung,et al.  Mechanism of the Blue Up-Conversion in Tm3+/Nd3+-doped Calcium Aluminate Glasses , 2005 .

[7]  Angela B. Seddon,et al.  Chalcogenide glasses : a review of their preparation, properties and applications , 1995 .

[8]  J. Qiu,et al.  Efficient blue up-conversion luminescence of Tm3+ ions in transparent oxyfluoride glass ceramics containing Pbx Cd1−x F2 nanocrystals , 2002 .

[9]  Sun-Youn Ryou,et al.  Raman spectroscopic analysis on the solubility mechanism of La3+ in GeS2–Ga2S3 glasses , 1998 .

[10]  J. Song,et al.  Emission properties and local structure of Tm3+ in Ge–Ga–S–Br glass , 2007 .

[11]  Mathieu Allix,et al.  Upconversion luminescence of transparent Er3+-doped chalcohalide glass–ceramics , 2009 .

[12]  J. Mackenzie,et al.  Chalcohalide glasses for infrared fiber optics , 1991 .

[13]  Jean-Luc Adam,et al.  Infrared-to-visible upconversion in Nd 3 + -doped chalcohalide glasses , 2001 .

[14]  Zhong-hong Jiang,et al.  Upconversion luminescence of Tm3+/Yb3+-codoped oxyhalide tellurite glasses , 2005 .

[15]  F. Teng,et al.  Frequency upconversion of Tm3+ and Yb3+ codoped YLiF4 synthesized by hydrothermal method , 2005 .

[16]  J. Heo,et al.  Enhancement of the 1.31-μm emission properties of Dy^3+-doped Ge–Ga–S glasses with the addition of alkali halides , 2001 .

[17]  W. J. Chung,et al.  Energy Transfer Process for the Blue Up‐Conversion in Calcium Aluminate Glasses Doped with Tm3+ and Nd3+ , 2004 .