Optical transitions of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Er</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>ions in fluorozirconate glass

Shinn, Michelle D.; Sibley, W. A.; Drexhage, M. G.; Brown, Richard N.

doi:10.1103/physrevb.27.6635

Cited by 577 publications

(198 citation statements)

References 29 publications

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“…8, a change in the relative intensity of the 530 nm ( 2 Hn/2 -^-4 Iis/2) and 550 nm ( 4 S3/2 -^-4 Iis/2 ) bands can be observed. These effects have been previously observed in a variety of host materials and attributed to a poor thermal contact between the nanoparticles, which favors a local temperature increase during optical excitation [29][30][31]. Since the energy gap between both emitting multiplets is relatively low (around 800 cm _1 ), they are thermally coupled at ordinary temperatures following a Boltzmann distribution.…”

Section: J ^7/2mentioning

confidence: 98%

Preparation and characterization of stable aqueous suspensions of up-converting Er3+/Yb3+-doped LiNbO3 nanocrystals

Villegas¹,

Caballero²,

Quintanilla

et al. 2011

Appl. Phys. B

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The preparation of LiNb03:Er 3+ /Yb 3+ nanocrystals and their up-conversion properties have been studied. It is demonstrated that polyethyleneimine-(PEÍ) assisted dispersión procedures allow obtaining stable aqueous LiNbÜ3 :Er 3+ /Yb 3+ powder suspensions, with average size particles well below the micron range (100-200 nm) and the isoelectric point of the suspensión reaching valúes well above pH 7. After excitation of Yb 3+ ions at a wavelengfh of 980 nm, the suspensions exhibit efflcient, and stable, IRto-visible (green and red) up-conversion properties, easily observed by the naked eye, very similar to those of the starting crystalline bulk material.

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Section: J ^7/2mentioning

confidence: 98%

Preparation and characterization of stable aqueous suspensions of up-converting Er3+/Yb3+-doped LiNbO3 nanocrystals

Villegas¹,

Caballero²,

Quintanilla

et al. 2011

Appl. Phys. B

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“…We have used value S = 0.1, which is in accordance with experimental values obtained for Er ions fluorozirconate glasses. 30 The influence of the value of Huang-Rhys parameter is shortly discussed in Ref. 31.…”

Section: ͑8͒mentioning

confidence: 99%

Energy transfer in Er-dopedSiO2sensitized with Si nanocrystals

et al. 2008

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We present a high-resolution photoluminescence study of Er-doped SiO 2 sensitized with Si nanocrystals ͑Si NCs͒. Emission bands originating from recombination of excitons confined in Si NCs, internal transitions within the 4f-electron core of Er 3+ ions, and a band centered at Ϸ 1200 nm have been identified. Their kinetics were investigated in detail. Based on these measurements, we present a comprehensive model for energy-transfer mechanisms responsible for light generation in this system. A unique picture of energy flow between the two subsystems was developed, yielding truly microscopic information on the sensitization effect and its limitations. In particular, we show that most of the Er 3+ ions available in the system are participating in the energy exchange. The long-standing problem of apparent loss of optical activity in the majority of Er dopants upon sensitization with Si NCs is clarified and assigned to the appearance of a very efficient energy exchange mechanism between Si NCs and Er 3+ ions. Application potential of SiO 2 : Er, sensitized by Si NCs, was discussed in view of the newly acquired microscopic insight.

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“…24), and fluoride glass (80 C) (Ref. 25). Since~T has been frequently used as a rough estimate of the glass formation ability or glass stability against crystallization, a large~T is beneficial to the fiber drawing.…”

Section: Resultsmentioning

confidence: 99%

Enhanced effect of Ce3+ ions on 2 μm emission and energy transfer properties in Yb3+/Ho3+ doped fluorophosphate glasses

Tian,

Xu,

Zhang

et al. 2011

Journal of Applied Physics

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Effect of Ce 3þ ions introduction on 2 lm emission properties and energy transfer mechanism in Yb 3þ /Ho 3þ -doped fluorophosphate glass has been investigated. From the measured fluorescence spectra, strong emission near 2 lm is demonstrated due to the sensitization of Yb 3þ and Ce 3þ . Based on the absorption spectra, the Judd-Ofelt parameters and radiative properties were calculated and compared with those of other glass hosts. In addition, the energy transfer coefficient from Yb 3þ to Ho 3þ is 9.52 Â 10 À40 cm 6 /s in Yb 3þ /Ho 3þ /Ce 3þ triply doped sample and is three times larger than that in undoped Ce 3þ sample. These results suggest that this Yb 3þ /Ho 3þ /Ce 3þ fluorophosphate glass with excellent thermal stability and efficient energy transfer from Yb 3þ to Ho 3þ is a good candidate for 2 lm laser.

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Optical transitions ofEr3+ions in fluorozirconate glass

Cited by 577 publications

References 29 publications

Preparation and characterization of stable aqueous suspensions of up-converting Er3+/Yb3+-doped LiNbO3 nanocrystals

Preparation and characterization of stable aqueous suspensions of up-converting Er3+/Yb3+-doped LiNbO3 nanocrystals

Energy transfer in Er-dopedSiO2sensitized with Si nanocrystals

Enhanced effect of Ce3+ ions on 2 μm emission and energy transfer properties in Yb3+/Ho3+ doped fluorophosphate glasses

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