Co-doping effects in rare-earth-doped planar waveguides

1996 ◽  
Vol 143 (5) ◽  
pp. 293-297 ◽  
Author(s):  
J.R. Bonar ◽  
J.S. Aitchison
Keyword(s):  
Rare Earth ◽  
Planar Waveguides ◽  
Co Doping ◽  
Doping Effects ◽  
Rare Earth Doped

Blue, Green and Red Upconverted Emission of Controlled Hydrothermal Pressure Synthesized Y2O3: Er3+ (1%) Tm3+ (1%) and Different Yb3+ Ratio Conditions Nanophosphors

2019 ◽  
Vol 9 (3) ◽  
pp. 226-231 ◽  
Author(s):  
Solange Ivette Rivera Manrique ◽  
Felipe de Jesús Carrillo Romo ◽  
Antonieta García Murillo ◽  
Carlos Eduardo Rodríguez García ◽  
Jorge Roberto Oliva Uc
Keyword(s):  
Crystal Structure ◽  
Rare Earth ◽  
Hydrothermal Method ◽  
Near Infrared ◽  
Initial Pressure ◽  
Sem Images ◽  
Host Matrix ◽  
Chemical Homogeneity ◽  
Co Doping ◽  
Rare Earth Doped

Introduction: Rare earth-doped Upconverting Nanoparticles (UCN's) can convert near-infrared photons into visible photons via multiphoton processes, which makes it a good material for generating white light. The production of luminescent materials for technology applications focuses on controlling powder characteristics such as chemical homogeneity and low impurity levels. Objective: In this research study, we synthesized Er3+ (1%) Tm3+ (1%) Yb3+ (at different percentages) by co-doping Y2O3 NPs, using the Controlled-Pressure Hydrothermal Method (CPHM), with nitrogen. The ratio used was chosen to conduct a detailed photolumniscence analysis. Methods: Samples of Y2O3: Er3+ (1%) Tm3+ (1%) Yb3+ (at 1.5%, 2%, and 2.5%) were prepared using the controlled-pressure hydrothermal method (CPHM). Each solution was transferred into a mini-clave drive Büchiglasuster with an inner Teflon vessel. In this case, the mini-clave was heated at 190°C for 3 h, and nitrogen was used to control the pressure. The initial pressure was 20 bars; it was increased during the process to 42 bars. The powders obtained were washed with distilled water using centrifugation at 4000 rpm for 15 min. The washed product was dried to 120°C, followed by subsequent heat treatment at 1000°C for 5 h. Results: The representative XRD patterns for the Y2O3: Er3+ (1%) Tm3+ (1%) and Yb3+ (at 1.5%, 2%, 2.5%) doped samples confirms the presence of a cubic Y2O3 crystal structure. Scanning Electron Microscope (SEM) images show that the morphology of these particles is spherical. Upconversion photoluminescence spectra of Y2O3:Er3+ (1% mol) Tm3+ (1% mol) Yb3+ (1.5% mol), Yb3+ (2.0% mol), and Yb3+ (2.5% mol), after 908-nm excitation. Blue, green, and red bands are centred at 440 nm, 469 nm, 618 nm, and 678 nm, respectively. Conclusion: The controlled-pressure hydrothermal method is a productive method for synthesizing rare earth-doped and codoped Y2O3; when Er3+, Yb3+, and Tm3+ ions are introduced into the host matrix, they do not cause any changes in the cubic structure nor influence the crystal structure. This method can used to synthesize any type of nanoparticle, because it involves low pressure (10-20 bars), low temperatures, and short time reactions.

Infrared to visible conversion in rare-earth-doped planar waveguides

1995 ◽  
Vol 184 ◽  
pp. 341-345 ◽  
Author(s):  
M.F. Joubert ◽  
A. Remillieux ◽  
B. Jacquier ◽  
J. Mugnier ◽  
B. Boulard ◽  
...  
Keyword(s):  
Rare Earth ◽  
Planar Waveguides ◽  
Rare Earth Doped

Spectroscopy and characterisation of rare-earth doped PZG and ZBLA fluoride glass planar waveguides

1997 ◽  
Vol 72-74 ◽  
pp. 321-323 ◽  
Author(s):  
M.C.Marco de Lucas ◽  
C. Garapon ◽  
E. Lebrasseur ◽  
J. Mugnier ◽  
B. Jacquier ◽  
...  
Keyword(s):  
Rare Earth ◽  
Planar Waveguides ◽  
Fluoride Glass ◽  
Rare Earth Doped

Study on Preparation of RGB Tricolor Up-Conversion Fluorescent Powder

2014 ◽  
Vol 1015 ◽  
pp. 566-569
Author(s):  
Chun Hui Niu ◽  
Yong Lv ◽  
Xiao Ying Li ◽  
Qing Shan Chen
Keyword(s):  
Rare Earth ◽  
Rare Earth Ions ◽  
Photon Absorption ◽  
Green Luminescence ◽  
Solid State Method ◽  
Two Photon Absorption ◽  
Co Doping ◽  
Two Photon ◽  
Luminescence Process ◽  
Rare Earth Doped

For producing RGB tricolor luminescence, three kinds of components of rare-earth ions is chosen, which are Er3+doping, Er3+-Yb3+co-doping and Tm3+-Yb3+co-doping, respectively. Three kinds of rare-earth doped up-conversion fluoride material are prepared based on high temperature solid-state method. Under being excited by 980nm laser, three materials emit red, green and blue light, whose peak wavelengths are 660nm, 550nm and 480nm, respectively. Through analysis of luminescence process, it can be concluded that red and green luminescence are belong to two-photon absorption transversion, and blue luminescence is three-photon absorption transversion.

Rare-earth-doped HfO2 nanoparticles embedded in SiO2-HfO2 planar waveguides: preparation and optical, structural, and spectroscopic characterization

2000 ◽  
Author(s):  
Sidney J. L. Ribeiro ◽  
Rogeria R. Goncalves ◽  
Younes Messaddeq ◽  
Michel A. Aegerter ◽  
Maurizio Montagna ◽  
...  
Keyword(s):  
Rare Earth ◽  
Spectroscopic Characterization ◽  
Planar Waveguides ◽  
Rare Earth Doped

scholarly journals Red photonic glasses and confined structures

2014 ◽  
Vol 62 (4) ◽  
pp. 647-653
Author(s):  
R.R. Gonçalves ◽  
A. Lukowiak ◽  
D. Ristic ◽  
B. Boulard ◽  
A. Chiappini ◽  
...  
Keyword(s):  
Rare Earth ◽  
Structural Properties ◽  
Glass Ceramics ◽  
Short Review ◽  
Planar Waveguides ◽  
Transparent Glass ◽  
Interesting Class ◽  
Confined Structures ◽  
Rare Earth Doped ◽  
State Of Art

Abstract We present some recent results obtained by our team in rare earth doped photonic glasses and confined structures, in order to give some highlights regarding the state of art in glass photonics. To evidence the unique properties of transparent glass ceramics we compare spectroscopic and structural properties between the parent glass and the glass ceramics. Starting from planar waveguides we move to spherical microresonators, a very interesting class of photonic confined structures. We also conclude the short review with some remarks about the perspective for glass photonics.

scholarly journals Swift heavy ion irradiated planar waveguides in a rare earth doped tungsten Tellurite glass and a tungstate crystal

2019 ◽  
Author(s):  
I. Bányász ◽  
G. U. L. Nagy ◽  
I. Rajta ◽  
V. Havránek ◽  
V. Vosecek ◽  
...  
Keyword(s):  
Rare Earth ◽  
Tellurite Glass ◽  
Heavy Ion ◽  
Planar Waveguides ◽  
Swift Heavy Ion ◽  
Rare Earth Doped ◽  
Tungstate Crystal
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