Energy transfer and enhanced broadband near-infrared luminescence in Yb–Bi codoped phosphate glasses

2009 ◽  
Vol 24 (2) ◽  
pp. 516-519 ◽  
Author(s):  
Jian Ruan ◽  
Botao Wu ◽  
Danping Chen ◽  
Yanbo Qiao ◽  
Jianrong Qiu
Keyword(s):  
Energy Transfer ◽  
Emission Intensity ◽  
Near Infrared ◽  
Infrared Emission ◽  
Phosphate Glasses ◽  
Promising Candidate ◽  
Optical Amplification ◽  
Infrared Luminescence ◽  
Doped Glass ◽  
Near Infrared Emission

In this article, we report on enhanced broadband near-infrared emission in Yb–Bi codoped phosphate glasses. The emission intensity of Yb–Bi codoped glass was ˜32 times larger than that of Bi-doped glass when excited with 980-nm laser diode. The highest 1/e fluorescent lifetime of Yb–Bi codoped glass reached 1650 μs. The dependence of emission intensity and fluorescent lifetime on Yb2O3 concentration was investigated. The enhancement of the near-infrared emission is due to energy transfer from Yb3+ (2F5/2–2F7/2) transition to Bi ions, and the highest energy transfer efficiency reached 50%. Yb–Bi codoped phosphate glass should be a promising candidate for broadband optical amplification.

Greatly enhanced broadband near-infrared emission due to energy transfer from Cr3+ to Ni2+ in transparent magnesium aluminosilicate glass ceramics

2009 ◽  
Vol 24 (2) ◽  
pp. 310-315 ◽  
Author(s):  
Jin Luo ◽  
Shifeng Zhou ◽  
Botao Wu ◽  
Hucheng Yang ◽  
Song Ye ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Near Infrared ◽  
Glass Ceramics ◽  
Infrared Emission ◽  
Aluminosilicate Glass ◽  
Nanocrystalline Phase ◽  
Doped Glass ◽  
Near Infrared Emission ◽  
532 Nm ◽  
Co Doped

Cr3+/Ni2+ co-doped optically transparent magnesium aluminosilicate glass-ceramics containing MgAl2O4 nanocrystals have been prepared by heat-treatment. Greatly enhanced broadband near-infrared emission centered at 1216 nm in Cr3+/Ni2+ co-doped glass ceramics is observed when compared with the Ni2+ single-doped glass ceramics under 532 nm excitation. The observed enhancement of infrared emission is attributed to the energy transfer from Cr3+ to Ni2+ ions in the nanocrystalline phase, which leads to the emission due to 3T2(3F) → 3A2(3F) transition of octahedral Ni2+ ions.

Preparation, growth mechanism, size manipulation and near-infrared luminescence enhancement of β-NaYF4:Nd3+ microcrystals via Ca2+ doping

CrystEngComm ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 741-748 ◽  
Author(s):  
Qinqin Shao ◽  
Hong Zhang ◽  
Jiangyun Dai ◽  
Chao Yang ◽  
Xiaoxu Chen ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Emission Intensity ◽  
Near Infrared ◽  
Infrared Emission ◽  
Luminescence Enhancement ◽  
Infrared Luminescence ◽  
Near Infrared Emission

The near-infrared emission intensity of NaYF4:3% Nd3+ doped with 20 mol% Ca2+ is 3 times that of the Ca2+-free samples.

scholarly journals Direct evidence on the energy transfer of near-infrared emission in PbS quantum dot-doped glass

2015 ◽  
Vol 23 (13) ◽  
pp. 16723 ◽  
Author(s):  
Haipeng Wang ◽  
Guobo Wu ◽  
Jianrong Qiu ◽  
Guoping Dong
Keyword(s):  
Energy Transfer ◽  
Quantum Dot ◽  
Near Infrared ◽  
Direct Evidence ◽  
Infrared Emission ◽  
Doped Glass ◽  
Near Infrared Emission ◽  
Pbs Quantum Dot

Near-Infrared Luminescence and Energy Transfer Characteristics of Dy3+-Tm3+ Co-Doped Selenide Glasses

2007 ◽  
Vol 336-338 ◽  
pp. 647-650
Author(s):  
Zhi Yong Yang ◽  
Lan Luo ◽  
Wei Chen
Keyword(s):  
Energy Transfer ◽  
Near Infrared ◽  
Direct Interaction ◽  
Infrared Emission ◽  
Emission Properties ◽  
Diffusion Limited ◽  
Infrared Luminescence ◽  
Near Infrared Emission ◽  
Energy Acceptor ◽  
Co Doped

Near-infrared emission properties of Dy3+-Tm3+ co-doped Ge-Ga-Sb-Se glasses were investigated. Possible energy transfer routes and the regime of donor decay were discussed. Tm3+ is found to be an efficient sensitizer on the Dy3+:1.34μm luminescence. Probable energy transfer schemes include Tm3+:3H4 → Dy3+: 6F5/2 and Tm3+:3H5 → Dy3+:6F11/2· 6H9/2. The donor (Tm3+) excitation is transferred to an acceptor (Dy3+) by direct interaction or migrates among donors by diffusion-limited regime until it comes into the vicinity of an energy acceptor where direct interaction and transfer occur.

Enhanced broadband near-infrared emission and energy transfer in Bi-Tm-codoped germanate glasses for broadband optical amplification

2009 ◽  
Vol 34 (16) ◽  
pp. 2486 ◽  
Author(s):  
Jian Ruan ◽  
Guoping Dong ◽  
Xiaofeng Liu ◽  
Qiang Zhang ◽  
Danping Chen ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Near Infrared ◽  
Infrared Emission ◽  
Optical Amplification ◽  
Near Infrared Emission ◽  
Germanate Glasses

scholarly journals Broadband Near-Infrared Luminescence in Lead Germanate Glass Triply Doped with Yb3+/Er3+/Tm3+

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2901
Author(s):  
Wojciech A. Pisarski ◽  
Joanna Pisarska ◽  
Radosław Lisiecki ◽  
Witold Ryba-Romanowski
Keyword(s):  
Energy Transfer ◽  
Near Infrared ◽  
Infrared Emission ◽  
Relaxation Processes ◽  
Lead Germanate ◽  
Germanate Glass ◽  
Transfer Processes ◽  
Infrared Luminescence ◽  
Near Infrared Emission ◽  
Co Doped

This paper deals with broadband near-infrared luminescence properties of lead germanate glass triply doped with Yb3+/Er3+/Tm3+. Samples were excited at 800 nm and 975 nm. Their emission intensities and lifetimes depend significantly on Er3+ and Tm3+ concentrations. For samples excited at 800 nm, broadband emissions corresponding to the overlapped 3H4 → 3F4 (Tm3+) and 4I13/2 → 4I15/2 (Er3+) transitions centered at 1.45 µm and 1.5 µm was identified. Measurements of decay curves confirm reduction of 3H4 (Tm3+), 2F5/2 (Yb3+) and 4I13/2 (Er3+) luminescence lifetimes and the presence of energy-transfer processes. The maximal spectral bandwidth equal to 269 nm for the 3F4 → 3H6 transition of Tm3+ suggests that our glass co-doped with Yb3+/Er3+/Tm3+ is a good candidate for broadband near-infrared emission. The energy transfer from 4I13/2 (Er3+) to 3F4 (Tm3+) and cross-relaxation processes are responsible for the enhancement of broadband luminescence near 1.8 µm attributed to the 3F4 → 3H6 transition of thulium ions in lead germanate glass under excitation of Yb3+ ions at 975 nm.

Temperature-dependent broadband near-infrared luminescence in silicate glass ceramics containing Li2MgSiO4: Cr4+ nanocrystals

2010 ◽  
Vol 25 (9) ◽  
pp. 1833-1837 ◽  
Author(s):  
Yixi Zhuang ◽  
Jiajia Zhou ◽  
Junhua Xie ◽  
Yu Teng ◽  
Jianrong Qiu
Keyword(s):  
Fluorescence Lifetime ◽  
Near Infrared ◽  
Glass Ceramics ◽  
Infrared Emission ◽  
Temperature Dependent ◽  
Energy Level Scheme ◽  
Mixed Effect ◽  
Infrared Luminescence ◽  
Doped Glass ◽  
Near Infrared Emission

Transparent glass ceramics containing Li2MgSiO4: Cr4+ nanocrystallites were prepared. Intense broadband near-infrared emission with full width at half-maximum larger than 200 nm and long fluorescence lifetime (τ > 100 μs) were observed. The temperature-dependent optical characteristics of the glass ceramics containing Li2MgSiO4: Cr4+ crystallites were compared to those of Li2MgSiO4: Cr4+ single crystals. The reason for extra-long near-infrared fluorescence lifetime was illuminated by the mixed effect between 3T2 and 1E levels. The crystal-filed-induced particular energy-level scheme makes the fluorescence lifetime of the glass ceramics containing Li2MgSiO4: Cr4+ crystallites one order longer than those of other Cr4+-doped glass ceramics.

Core-mediated synthesis, growth mechanism and near-infrared luminescence enhancement of α-NaGdF4@β-NaLuF4:Nd3+ core–shell nanocrystals

CrystEngComm ◽  
2020 ◽  
Vol 22 (8) ◽  
pp. 1359-1367 ◽  
Author(s):  
Qinqin Shao ◽  
Chao Yang ◽  
Xiaoxu Chen ◽  
Hong Zhang ◽  
Guoying Feng ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Emission Intensity ◽  
High Performance ◽  
Near Infrared ◽  
Infrared Emission ◽  
Core Shell ◽  
Luminescence Enhancement ◽  
Infrared Luminescence ◽  
Near Infrared Emission

High-performance α-NaGdF4@β-NaLuF4:Nd3+ nanocrystals have been constructed based on a core-mediated method. Their near-infrared emission intensity was eventually enhanced by more than 2 times.

scholarly journals Impact of ZnO Addition on Er3+ Near-Infrared Emission, the Formation of Ag Nanoparticles, and the Crystallization of Sodium Fluorophosphate Glass

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 527
Author(s):  
Luukas Kuusela ◽  
Alexander Veber ◽  
Nadia G. Boetti ◽  
Laeticia Petit
Keyword(s):  
Ag Nanoparticles ◽  
Near Infrared ◽  
Glass Network ◽  
Silver Ions ◽  
Heat Treating ◽  
Infrared Emission ◽  
Phosphate Glasses ◽  
Behavior Study ◽  
The Impact ◽  
Near Infrared Emission

The impact of the progressive addition of ZnO up to 5 mol% on the thermal, structural, and optical properties of Er3+-doped phosphate glasses within the system NaPO3-NaF-ZnO-Ag2O is discussed. The glass network was found to depolymerize upon the addition of ZnO. This promotes a slight increase in the intensity of the emission at 1.5 µm as well as enhances the silver ions clustering ability under the heat treating. The Ag-nanoparticles formed after moderate heat-treatment can further enhance the emission at 1.5 µm, whereas an excessive amount of the clusters leads to the opposite effect. The addition of ZnO helps to slightly increase the glass ability of the system. The crystallization behavior study revealed that surface crystallization is observed for all the glasses. It is found that even a small ZnO addition changes the crystalline phases formed after devitrification. Moreover, the addition of ZnO decreases the crystallization tendency of the glass.

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