Physico-chemical and optical properties of Er3+-doped and Er3+/Yb3+-co-doped Ge25Ga9.5Sb0.5S65 chalcogenide glass

2017 ◽  
Vol 89 (4) ◽  
pp. 429-436 ◽  
Author(s):  
Dianna Himics ◽  
Lukas Strizik ◽  
Jana Holubova ◽  
Ludvik Benes ◽  
Karel Palka ◽  
...  
Keyword(s):  
Optical Properties ◽  
Concentration Quenching ◽  
Electronic Transitions ◽  
Ofelt Theory ◽  
Optical Amplification ◽  
Excitation Light ◽  
Physico Chemical ◽  
532 Nm ◽  
Co Doped ◽  
Green Spectral Region

AbstractWe investigated the physicochemicаl properties, structure and optical properties of the Ge25Ga9.5Sb0.5S65: Er3+/Yb3+ glasses. The Judd-Ofelt theory was used to calculate the intensities of the intra-4f electronic transitions of Er3+ ions. We observed the upconversion photoluminescence (UCPL) at 530, 550, 660 and 810 nm under 980 nm excitation. In the Ge25Ga9.5Sb0.5S65: 0.1 at.% Er3+, we found that the Stokes photoluminescence (PL) at the green spectral region excited by the 490 and 532 nm laser is only ≈5 times higher than the UCPL emission under 810 or 980 nm excitation making these materials attractive for UCPL applications. The addition of 0.1–1 at.% of Yb3+ into Ge25Ga9.5Sb0.5S65: 0.1 at.% Er3+ glass reduces the UCPL as well as the Er3+ ≈1.5 μm emission intensity probably due to the reabsorption processes of the excitation light and concentration quenching. However, the observed Er3+: 4S3/2→4I13/2 (≈850 nm) emission in the Ge25Ga9.5Sb0.5S65: 0.1 at.% Er3+ sample populates the 4I13/2 level, which promises the using of this material for the 1.5 μm optical amplification.

OPTICAL PROPERTIES OF Er AND Si-NANOCRYSTAL CO-DOPED SiO2 FILMS AT A HIGH Er CONCENTRATION REGIME

2005 ◽  
Vol 19 (15n17) ◽  
pp. 2598-2603
Author(s):  
KIMIHISA MATSUMOTO ◽  
KENJI IMAKITA ◽  
MINORU FUJII ◽  
SHINJI HAYASHI
Keyword(s):  
Optical Properties ◽  
Energy Transfer ◽  
Amorphous Alloy ◽  
Excitation Light ◽  
Sio2 Films ◽  
Si Nanocrystals ◽  
Si Nanocrystal ◽  
Pl Intensity ◽  
Co Doped

Photoluminescence (PL) properties of Er and Si nanocrystals co-doped SiO 2 films are studied in a wide Er concentration range. In the Er concentration range of less than 3 at%, Er 3+ was excited by the energy transfer from Si nanocrystals. Above this concentration, Si nanocrystals and Er do not exist independently but amorphous or crystallin alloys of Si-Er-O are formed. In this region Er can be excited only by directly absorbed excitation light. The highest PL intensity is observed in the Er concentration range where an amorphous alloy of Si-Er-O is formed.

Structure and optical properties of Zn and Mn co-doped nano-NiFe2O4

2021 ◽  
Author(s):  
Zein K. Heiba ◽  
Mohamed Bakr Mohamed ◽  
Noura M. Farag ◽  
Sameh I. Ahmed
Keyword(s):  
Optical Properties ◽  
Co Doped

scholarly journals Synthesis and Optical Properties of B-Mg co-Doped ZnO Nanoparticles

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 882
Author(s):  
Yuechan Li ◽  
Yongli Li ◽  
An Xie
Keyword(s):  
Optical Properties ◽  
Zno Nanoparticles ◽  
Great Influence ◽  
Structure Study ◽  
Band Gap Energy ◽  
One Pot ◽  
Gap Energy ◽  
Doping Impurity ◽  
Shrinkage Effect ◽  
Co Doped

Doping impurity into ZnO is an effective and powerful technique to tailor structures and enhance its optical properties. In this work, Zn1−xMgxO and Zn1−x−yMgxByO nanoparticles (x = 0, 0.1, 0.2, 0.3, 0.4; y = 0, 0.02, 0.04) were synthesized via one-pot method. It shows that the Mg and B dopants has great influence on crystallinity and surface morphology of ZnO nanoparticles, without changing the wurtzite structure of ZnO. The band structure study indicates that the competition of Conductive Band (CB) shift, Burstein–Moss (B-M) shift and Shrinkage effect will cause the band gap energy change in ZnO.

Influence of Al/Er ratio on the optical properties and structures of Er3+/ Al3+ co-doped silica glasses

2021 ◽  
Vol 129 (5) ◽  
pp. 053104
Author(s):  
Yan Jiao ◽  
Mengting Guo ◽  
Renle Wang ◽  
Chongyun Shao ◽  
Lili Hu
Keyword(s):  
Optical Properties ◽  
Silica Glasses ◽  
Co Doped

scholarly journals Photoluminescence Activity of Neodymium-Doped Gallium Oxide Thin Films

2008 ◽  
Vol 1111 ◽  
Author(s):  
Celine Lecerf ◽  
Philippe Marie ◽  
Cedric Frilay ◽  
Julien Cardin ◽  
Xavier Portier
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Substrate Temperature ◽  
Gallium Oxide ◽  
Electronic Transitions ◽  
Oxide Thin Films ◽  
Structural And Optical Properties ◽  
Luminescence Efficiency

AbstractPhotoluminescence activity was observed for neodymium-doped gallium oxide thin films prepared by radiofrequency magnetron co-sputtering. Structural and optical properties of as-grown and annealed films were studied and photoluminescence activity was especially investigated. The most intense lines were associated to the 4F3/2  4I9/2 and 4F3/2  4I11/2 electronic transitions of Nd3+. The effects of deposition and treatment parameters such as the substrate temperature, the post anneal treatment or the neodymium content in the films were particularly examined with the aim to reach the best luminescence efficiency.

Er-doped and Er, Yb co-doped oxyfluoride glasses and glass–ceramics, structural and optical properties

2011 ◽  
Vol 33 (11) ◽  
pp. 1630-1637 ◽  
Author(s):  
Radosław Lisiecki ◽  
Elżbieta Augustyn ◽  
Witold Ryba-Romanowski ◽  
Michał Żelechower
Keyword(s):  
Optical Properties ◽  
Glass Ceramics ◽  
Structural And Optical Properties ◽  
Oxyfluoride Glasses ◽  
Er Doped ◽  
Co Doped
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