Growth and optical properties of Pr,Yb-codoped KY3F10 fluoride single crystals for up-conversion visible luminescence

Kim, Kyoung Jin; Jouini, Ahlem; Yoshikawa, Akira; Simura, Rayko; Boulon, G.; Fukuda, Tsuguo

doi:10.1016/j.jcrysgro.2006.10.220

Cited by 46 publications

(24 citation statements)

References 15 publications

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“…Its rate constant can be calculated from relation q = 1/τ 5 -1/τ R5 (5) Using that τ 5 =143 µs and τ R5 = 1.14 ms (experimental measures) one gets q = 6.12 x10 3 s -1 . Tm( 3 H 4 ):Tm( 3 H 6 ) cross-relaxation rate (process r) was calculated using the relation…”

Section: Yb-tm Interaction (Step 2)mentioning

confidence: 99%

“…KY3F is the only compound in the KF-YF 3 system that melts congruently without any phase transition. It crystallizes in the cubic fluorite-type structure (Fm3m) with lattice parameter a = 11.54 Å [ [5]], and the site symmetry of the Yttrium is tetragonal (C 4v ) and is isotropic crystals. In this paper, KY 3 F 10 (KY3F) doped with Thulium (Tm) ions that are sensitized by Neodymium (Nd) and Ytterbium (Yb) were studied, and the multiples processes of energy transfer that occurs when these materials are excited around 800 nm were inspected.…”

Section: Introductionmentioning

confidence: 99%

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Energy transfer rates of KY₃F₁₀:Yb:Nd:Tm crystals

Courrol

Linhares

Librantz

et al. 2010

J. Phys.: Conf. Ser.

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Abstract. In this work we present the spectroscopic properties of KY3F10 (KY3F) single crystals doped with thulium and also co-doped with ytterbium and/or neodymium, KY3F:Yb:Nd:Tm and KY3F:Nd:Tm. The most important processes that lead to the thulium up conversion emissions were identified. The absorption spectra of the samples were measured at room temperature in the range of 200 nm-1200 nm. The emission spectra were obtained by exciting the samples with a 797 nm laser diode and were analyzed using a lock-in amplifier technique. A time-resolved luminescence spectroscopy technique was employed to measure the luminescence decays and to determine the mechanisms involved in the energy transfer upconversion processes. Analysis of the energy transfer processes dynamics in KY3F:Yb:Tm:Nd crystal, using selective pulsed-laser excitations, shows that the energy transfer from Nd3+ to Yb3+ ions is the mechanism responsible for the enhancement of the blue up-conversion efficiency when compared with the Yb:Tm system. In the case of KY3F:Nd:Tm it is observed emissions at 350, 355 and 452 nm excited by an additional Yb:Tm step cross relaxation, Yb (2F5/2) : Tm (1G4) that populates the 1D2 (Tm3+) excited level. A study of the energy transfer processes in KY3F:Yb:Tm:Nd crystal showed that the 1G4 excited level is mainly populated by the sequence of two nonradiative energy processes that starts well after the Nd3+ and Tm3+ excitation at 797nm: Nd (4F3/2) → Yb (2F7/2) followed by Yb (2F5/2) → Tm (3H4) → Tm (1G4). IntroductionThe study of solids doped with thulium ions has received great interest in the last decades due to the numerous applications of these materials. Concerning to the thulium emission wavelength, these solids can be used as laser materials [[10]] for different applications in life sciences [[11]], LIDAR [[9]] and industry or can be applied as the S-band Tm-doped fiber amplifier (TDFA) in wavelength-divisionmultiplexing telecommunication [[6]

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Section: Yb-tm Interaction (Step 2)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy transfer rates of KY₃F₁₀:Yb:Nd:Tm crystals

Courrol

Linhares

Librantz

et al. 2010

J. Phys.: Conf. Ser.

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“…In literature are reported some papers regarding the growth of KY 3 F 10 as host material, doped with different RE, where it has been utilized or Bridgman [4] or micro-pulling down [5] or Czochralski [6] A c c e p t e d m a n u s c r i p t melts congruently at a temperature about 1300K. Moreover it presents good optical and thermomechanical properties, all fascinating features for optically based applications [8].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover it presents good optical and thermomechanical properties, all fascinating features for optically based applications [8]. Among RE dopant ions, Praseodymium shows quite strong visible emissions in the green, orange, red and infrared regions making it one of the most important dopant for laser applications [4,5,9,10,11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ce co-doping on KY3F10:Pr crystals

Veronesi¹,

Parisi²,

Marchetti³

et al. 2010

Journal of Physics and Chemistry of Solids

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“…In addition, KY 3 F 10 exhibit useful laser and luminescence properties when doped with Er 3+ , Eu 3+ , Ho 3+ and Pr 3+ [4][5][6][7][8][9][10][11]. Usually, these properties are sensitively related to the local environment (e.g., bonding length and angles) for these rare-earth impurities on the Y 3+ site.…”

Section: Introductionmentioning

confidence: 99%

Electron paramagnetic resonance parameters and local structure for Gd3+ in KY3F10

Zhang

2007

Pramana - J Phys

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The electron paramagnetic resonance parameters, zero-field splittings (ZFSs) b 0 2 , b 0 4 , b 4 4 , b 0 6 , b 4 6 and the g factors for Gd 3+ on the tetragonal Y 3+ site in KY3F10 are theoretically studied from the superposition model for the ZFSs and the approximation formula for the g factor containing the admixture of the ground 8 S 7/2 and the excited 6 L 7/2 (L=P, D, F, G) states via the spin-orbit coupling interactions, respectively. By analysing the above ZFSs, the local structure information for the impurity Gd 3+ is obtained, i.e., the impurity-ligand bonding angles related to the four-fold (C4) axis for the impurity Gd 3+ center are found to be about 0.6 • larger than those for the host Y 3+ site in KY3F10. The calculated ZFSs based on the above angular distortion as well as the g factors are in reasonable agreement with the observed values. The present studies on the ZFSs and the local structure would be helpful to understand the optical and magnetic properties of this material with Gd dopants.

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Growth and optical properties of Pr,Yb-codoped KY3F10 fluoride single crystals for up-conversion visible luminescence

Cited by 46 publications

References 15 publications

Energy transfer rates of KY₃F₁₀:Yb:Nd:Tm crystals

Energy transfer rates of KY₃F₁₀:Yb:Nd:Tm crystals

Effect of Ce co-doping on KY3F10:Pr crystals

Electron paramagnetic resonance parameters and local structure for Gd3+ in KY3F10

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Growth and optical properties of Pr,Yb-codoped KY3F10 fluoride single crystals for up-conversion visible luminescence

Cited by 46 publications

References 15 publications

Energy transfer rates of KY3F10:Yb:Nd:Tm crystals

Energy transfer rates of KY3F10:Yb:Nd:Tm crystals

Effect of Ce co-doping on KY3F10:Pr crystals

Electron paramagnetic resonance parameters and local structure for Gd3+ in KY3F10

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Energy transfer rates of KY₃F₁₀:Yb:Nd:Tm crystals

Energy transfer rates of KY₃F₁₀:Yb:Nd:Tm crystals