Structure and Up-Conversion Luminescence of Er3+/Yb3+ Co-Doped Lanthanum Zirconate Ceramics

2019 ◽  
Vol 18 (03n04) ◽  
pp. 1940081
Author(s):  
E. Trusova ◽  
R. Klement ◽  
Y. Tratsiak ◽  
L’. Bača ◽  
P. Veteška ◽  
...  
Keyword(s):  
Near Infrared ◽  
Laser Excitation ◽  
Laser Diodes ◽  
Luminescent Properties ◽  
Lanthanum Zirconate ◽  
Display Devices ◽  
Annealing Conditions ◽  
Potential Applications ◽  
Infrared Excitation ◽  
Co Doped

La2Zr2O7:Er, Yb nanoceramics have been obtained. Its structural and up-conversion luminescent properties were investigated. Under 980 nm laser excitation, the ceramics produced intense green and red up-conversion emission. The influence of Er3+ concentration and annealing conditions on the emission intensities has been discussed. The fabricated ceramics are expected to be an efficient up-conversion material with potential applications for laser diodes, display devices, detectors where the near infrared excitation is required.

Fabrication and Near-Infrared Luminescent Properties of Bismuth/Erbium Co-Doped Silica Fiber

2018 ◽  
Vol 45 (10) ◽  
pp. 1006004
Author(s):  
何涛 He Tao ◽  
文建湘 Wen Jianxiang ◽  
王骞 Wang Qian ◽  
庞拂飞 Pang Fufei ◽  
陈振宜 Chen Zhenyi ◽  
...  
Keyword(s):  
Near Infrared ◽  
Luminescent Properties ◽  
Silica Fiber ◽  
Co Doped

scholarly journals Visible and near-infrared luminescent properties of Pr3+/Yb3+ co-doped lanthanum ortho-niobate phosphors

2019 ◽  
Vol 97 ◽  
pp. 109399 ◽  
Author(s):  
João P.C. do Nascimento ◽  
Felipe F. do Carmo ◽  
Marcello X. Façanha ◽  
José E.V. de Morais ◽  
Antonio J.M. Sales ◽  
...  
Keyword(s):  
Near Infrared ◽  
Luminescent Properties ◽  
Co Doped

scholarly journals Florescence Intensity Ratio Thermometer in the First Biological Window Based on Non-Thermally Coupled Energy Levels of Tm3+ and Ho3+ Ions

2021 ◽  
Vol 8 ◽  
Author(s):  
Liang Li ◽  
Haoyue Hao
Keyword(s):  
Near Infrared ◽  
Energy Levels ◽  
Temperature Sensing ◽  
Infrared Light ◽  
Light Region ◽  
Potential Applications ◽  
Intensity Ratios ◽  
Sensing Sensitivity ◽  
Co Doped ◽  
Fluorescence Peak

In this study, the up-conversion luminescence and optical temperature sensing properties of Ho3+/Tm3+/Yb3+-co-doped NaLuF4 phosphors were investigated. The visible (475, 540, and 650 nm) and near-infrared light (692 and 800 nm) radiated from 1Ho3+/4Tm3+/Yb3+-co-doped NaLuF4 phosphors were obvious enough for subsequent detection. The slopes in the lnI–lnP plot of the emissions located in the first biological window (650, 692, and 800 nm) were both ∼1.5, which mean that the power had little effect on the three fluorescence peak ratios. Based on the florescence intensity ratios (FIRs) of 650 and 692 nm, the relative sensing sensitivity reaches 0.029 K−1 (476 K). The relative sensing sensitivity based on the FIRs of 800 and 692 nm reaches 0.0076 K−1 (476 K). The results reveal that 1Ho3+/4Tm3+/Yb3+-co-doped NaLuF4 phosphors have potential applications in FIR-based temperature sensing in biological tissue for their high sensing sensitivity. In addition, the emission colors of the sample stabilize in the white light region as the temperature increased from 303 to 467 K, implying that it can also be used in white display.

scholarly journals The Progress of Photoluminescent Properties of Rare-Earth-Ions-Doped Phosphate One-Dimensional Nanocrystals

2010 ◽  
Vol 2010 ◽  
pp. 1-6 ◽  
Author(s):  
Lixin Yu ◽  
Hai Liu
Keyword(s):  
Rare Earth ◽  
Data Storage ◽  
Luminescent Properties ◽  
Local Symmetry ◽  
Rare Earth Ions ◽  
Research Progress ◽  
One Dimensional ◽  
Display Devices ◽  
1D Nanostructures ◽  
Potential Applications

One-dimensional (1D) nanostructures, such as tubes, wires, rods, and belts, have aroused remarkable attentions over the past decade due to a great deal of potential applications, such as data storage, advanced catalyst, and photoelectronic devices . On the other hand, in comparison with zero-dimensional (0D) nanostructures, the space anisotropy of 1D structures provided a better model system to study the dependence of electronic transport, optical and mechanical properties on size confinement and dimensionality. Rare earth (RE) compounds, were intensively applied in luminescent and display devices. It is expected that in nanosized RE compounds the luminescent quantum efficiency (QE) and display resolution could be improved. In this paper, we systematically reported the research progress of luminescent properties of RE-doped 1D orthophosphate nanocrystal, including the synthesis of 1D nanostructures doped with RE ions, local symmetry of host, electronic transition processes, energy transfer (ET), and so forth.

Near-Infrared Excited Raman Optical Activity

2007 ◽  
Vol 61 (10) ◽  
pp. 1103-1106 ◽  
Author(s):  
Laurence A. Nafie ◽  
Bruce E. Brinson ◽  
Xiaolin Cao ◽  
David A. Rice ◽  
Omar M. Rahim ◽  
...  
Keyword(s):  
Optical Activity ◽  
Near Infrared ◽  
Laser Excitation ◽  
Visible Region ◽  
Fourth Power ◽  
Power Dependence ◽  
Expected Frequency ◽  
Raman Optical Activity ◽  
Infrared Excitation ◽  
532 Nm

Measurements of near-infrared scattered circular polarization Raman optical activity (SCP-ROA) are presented using laser excitation at 780 nm for samples of S-(—)-α-pinene and L-alanyl-L-alanine. These are the first measurements of ROA outside the blue-to-green visible region between 488 and 532 nm. Comparison of Raman and ROA intensities measured with excitation at 532 and 780 nm demonstrate that the expected frequency to the fourth-power dependence for Raman scattering and the corresponding fifth-power dependence for ROA are observed. It can be concluded that, to within this frequency dependence, the same level of efficiency of Raman and ROA measurements using commercial instrumentation with 532 nm excitation is maintained with the change to near-infrared excitation at 780 nm.

scholarly journals Structure and Luminescence Properties of Transparent Germanate Glass-Ceramics Co-Doped with Ni2+/Er3+ for Near-Infrared Optical Fiber Application

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2115
Author(s):  
Magdalena Lesniak ◽  
Marcin Kochanowicz ◽  
Agata Baranowska ◽  
Piotr Golonko ◽  
Marta Kuwik ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Near Infrared ◽  
Glass Ceramics ◽  
Glass Network ◽  
Luminescent Properties ◽  
Heating Time ◽  
Germanate Glass ◽  
Co Doped ◽  
Infrared Optical Fiber

An investigation of the structural and luminescent properties of the transparent germanate glass-ceramics co-doped with Ni2+/Er3+ for near-infrared optical fiber applications was presented. Modification of germanate glasses with 10–20 ZnO (mol.%) was focused to propose the additional heat treatment process controlled at 650 °C to obtain transparent glass-ceramics. The formation of 11 nm ZnGa2O4 nanocrystals was confirmed by the X-ray diffraction (XRD) method. It followed the glass network changes analyzed in detail (MIR—Mid Infrared spectroscopy) with an increasing heating time of precursor glass. The broadband 1000–1650 nm luminescence (λexc = 808 nm) was obtained as a result of Ni2+: 3T2(3F) → 3A2(3F) octahedral Ni2+ ions and Er3+: 4I13/2 → 4I15/2 radiative transitions and energy transfer from Ni2+ to Er3+ with the efficiency of 19%. Elaborated glass–nanocrystalline material is a very promising candidate for use as a core of broadband luminescence optical fibers.

Highly-reproducible Raman scattering of NaYF4:Yb,Er@SiO2@Ag for methylamphetamine detection under near-infrared laser excitation

The Analyst ◽  
2015 ◽  
Vol 140 (15) ◽  
pp. 5268-5275 ◽  
Author(s):  
Yongmei Ma ◽  
Honglin Liu ◽  
Zhenzhen Han ◽  
Liangbao Yang ◽  
Jinhuai Liu
Keyword(s):  
Raman Scattering ◽  
Near Infrared ◽  
Laser Excitation ◽  
Infrared Laser ◽  
Raman Enhancement ◽  
Infrared Excitation

NaYF4:Yb,Er@SiO2@Ag displays highly-reproducible Raman enhancement ability for methylamphetamine detection under near-infrared excitation.

scholarly journals Energy Transfer Studies in Tb3+-Yb3+ Co-Doped Phosphate Glasses

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6782
Author(s):  
Hadil Benrejeb ◽  
Kevin Soler-Carracedo ◽  
Antonio Diego Lozano-Gorrín ◽  
Sana Hraiech ◽  
Inocencio Rafael Martin Benenzuela
Keyword(s):  
Energy Transfer ◽  
Near Infrared ◽  
Emission Spectra ◽  
Excitation Power ◽  
Phosphate Glasses ◽  
Energy Transfer Mechanism ◽  
Blue Excitation ◽  
Decay Times ◽  
Infrared Excitation ◽  
Co Doped

Detailed optical properties of Tb3+-Yb3+ co-doped phosphate glasses were performed based on their emission spectra and decay measurements. Under blue excitation of Tb3+ at 488 nm, the intensity of Yb3+ emissions gradually enhanced upon increasing the Yb3+ content until 1 mol% indicated an energy transfer from Tb3+ to Yb3+. Otherwise, under near infrared excitation of Yb3+ at 980 nm, these glasses exhibit intense green luminescence, which led to cooperative sensitization of the 5D4 level of Tb3+ ions. A cooperative energy transfer mechanism was proposed on the basis of the study on the influence of Yb3+ concentration on up-conversion emission intensity, as well as the dependence of this up-conversion intensity on near infrared excitation power. Moreover, the temporal evolution of the up-conversion emissions have been studied, which was in positive agreement with a theoretical model of cooperative up-conversion luminescence that showed a temporal emission curve with rise and decay times of the involved levels.

Improved Near-Infrared Up-Conversion Emission of Tm3+ Sensitized by Yb3+ and Ho3+ in LuF3 Nanocrystals

2016 ◽  
Vol 16 (4) ◽  
pp. 3664-3668 ◽  
Author(s):  
Xuhui Xu ◽  
Yumei Wu ◽  
Wenjuan Bian ◽  
Xue Yu ◽  
Buhao Zhang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Laser Excitation ◽  
Green Emission ◽  
Color Displays ◽  
Bio Imaging ◽  
Nir Emission ◽  
Average Size ◽  
Co Doped

In the present work, mono-disperse and uniform orthorhombic lutetium fluoride (LuF3) nanocrystals with an average size of about 35 nm have been successfully synthesized by a simple ionothermal method without any template. The infrared (IR) to visible up-conversion (UC) photoluminescence of LuF3 doped with Yb3+, Tm3+, and Ho3+ under 980 nm excitation was systemically studied. The intensity of near infrared (NIR) to visible up-conversion emission of Tm3+ was improved efficiently by adding Yb3+ and Ho3+ in LuF3, especially for the broad NIR emission band located at 812 nm. Meanwhile, compared to the Yb3+ and Tm3+ co-doped LuF3, the ratio of red to green emission in the Yb3+, Tm3+, and Ho3+ co-doped LuF3 changed greatly, and a bright yellowish-green emission was observed under 980 nm laser excitation. It shows that Yb3+, Tm3+ and Ho3+ co-doped LuF3 nanocrystals provided a potential application in vitro and in vivo bio-imaging, color displays and optical storage.

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