Statistical model for energy-transfer-induced up-conversion in<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>-doped glasses

Sergeyev, Sergey; Jaskorzyńska, B.

doi:10.1103/physrevb.62.15628

Cited by 27 publications

(33 citation statements)

References 17 publications

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“…The critical distance is dependent upon a variety of factors and for a lanthanide ion is on the order of 10 Å. 35 As the concentration of the Ln 3ϩ dopant increases, the average distance between ions decreases thus favoring the ETU mechanism. Moreover, the anti-Stokes decay time lengthening is much more drastic in the 10 mol% nanocrystals indicating that ETU is the dominant mechanism in this sample.…”

Section: ͓1͔mentioning

confidence: 99%

Structural Investigation and Anti-Stokes Emission of Scandium Oxide Nanocrystals Activated with Trivalent Erbium

Boyer

Capobianco

Speghini

et al. 2005

J. Electrochem. Soc.

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The structural and emission ͑Stokes and anti-Stokes͒ properties of Sc 2 O 3 :Er 3ϩ nanocrystals doped with 0.1, 1, and 10 mol % Er 3ϩ were investigated. The nanocrystalline powders were characterized using X-ray scattering as well as transmission and scanning electron microscopy. The samples showed a very porous, open microstructure with the particles having a narrow distribution of sizes ͑10-60 nm͒. Furthermore, the mechanisms responsible for the anti-Stokes emission ( exc ϭ 980 nm) were elucidated. We observed that the processes responsible for populating the green ( 2 H 11/2 , 4 S 3/2 ) and red ( 4 F 9/2 ) emitting states were dependent upon the concentration of the dopant ion. In 0.1 mol % nanocrystalline Sc 2 O 3 :Er 3ϩ , upconversion was determined to occur via excited state absorption while in the 10 mol % sample, energy transfer upconversion was the dominant mechanism. The advances in nanoscale preparation techniques present an opportunity for the materials researcher to elucidate the properties of known materials synthesized directly in the nano domain without having to undergo the mechanical grinding techniques associated with conventional syntheses. A multitude of synthesis methods exist to prepare luminescent nanocrystals ranging from the very exotic ͑and expensive͒ to the very simple, involving only a heat source to initiate a combustion reaction.In this paper we study the luminescence ͑anti-Stokes emission, specifically͒ of scandium oxide (Sc 2 O 3 ) nanocrystals prepared by such a simple preparation technique, solution combustion synthesis ͑otherwise known as propellant synthesis͒. The propellant synthesis involves mixing the metal nitrate starting materials with an organic fuel to propagate the combustion reaction.1,2 Large quantities of gases are liberated as by-products of the synthesis reaction, which play a pivotal role by preventing the particle growth. One of the most attractive features of the combustion synthesis is that nanocrystals are produced at relatively low temperatures with reduced processing time. Thus, a high-temperature furnace is not required as the reaction is initiated at temperatures of 500°C or less.3 In a typical reaction the precursor mixture of distilled water, oxidizer, and fuel decomposes, dehydrates, and ruptures into a flame after approximately 5 min creating a voluminous foamy powder. The combustion reaction is influenced by a number of parameters such as type of fuel, fuel-to-oxidizer ratio, use of excess oxidizer, ignition temperature, and water content of the precursor mixture. 4,5The luminescence of nanoparticles has attracted a great deal of interest. In semiconductor nanocrystals for example, quantum size effects result when the size of the particle approaches the Bohr excitonic radius. [6][7][8] This quantum confinement results in an increase in the bandgap that in turn leads to a blue shift in the optical spectrum. 9 In insulating materials such as Y 2 O 3 :Ln 3ϩ , the bandgaps are very large with the electronic energy levels of the dopant ion residing with...

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Section: ͓1͔mentioning

confidence: 99%

Structural Investigation and Anti-Stokes Emission of Scandium Oxide Nanocrystals Activated with Trivalent Erbium

Boyer

Capobianco

Speghini

et al. 2005

J. Electrochem. Soc.

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“…By combining rate equations that describes dynamics of the excitation localization on the erbium ions located at the first and the second excited level [14][15][16][17][18][19][20][21][22] with equation for the lasing power, we result …”

Section: Experimental and Theoretical Characterisation Of Low-frequenmentioning

confidence: 99%

“…For theoretical characterization of the low-frequency auto-oscillations we develop a new model of HC EDFL with taking into account statistical nature of migrationassisted upconversion [14][15][16][17][18][19][20][21][22] and pump-to-signal intensity noise transfer [5]. By combining rate equations that describes dynamics of the excitation localization on the erbium ions located at the first and the second excited level [14][15][16][17][18][19][20][21][22] with equation for the lasing power, we result …”

Section: Experimental and Theoretical Characterisation Of Low-frequenmentioning

confidence: 99%

“…The rates of upconversion P and migration W (from ion to ions and ) for the dipole-dipole mechanism of excitation energy transfer are given as [14][15][16][17][18][19][20][21][22] …”

Section: Experimental and Theoretical Characterisation Of Low-frequenmentioning

confidence: 99%

“…In this paper we develop an advanced model of HC EDFL accounting for the statistical nature of migration and upconversion processes [14][15][16][17][18][19][20][21][22]. We apply this model to calculate the pump-to-signal intensity noise transfer function and demonstrate that resonance behaviour of this function can lead to appearance of the low-frequency autooscillations in the limited range of erbium concentrations.…”

Section: Introductionmentioning

confidence: 99%

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Upconversion assisted self-pulsing in a high-concentration erbium doped fibre laser

Sergeyev¹,

O'Mahoney²,

Popov³

et al. 2010

Open Physics

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Abstract:We report results on experimental and theoretical characterisation of self-pulsing in high concentration erbium doped fibre laser which is free from erbium clusters. Unlike previous models of self-pulsing accounting for pair-induced quenching (PIQ) on the clustered erbium ions, new model has been developed with accounting for statistical nature of the excitation migration and upconversion and resonance-like pumpto-signal intensity noise transfer. The obtained results are in a good agreement with the experimental data. PACS

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Rare Earth Doped Confined Structures for Lasers and Amplifiers

Jacquier¹,

Bigot²,

Guy³

et al. 2005

Spectroscopic Properties of Rare Earths in Optical Materials

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Statistical model for energy-transfer-induced up-conversion inEr3+-doped glasses

Cited by 27 publications

References 17 publications

Structural Investigation and Anti-Stokes Emission of Scandium Oxide Nanocrystals Activated with Trivalent Erbium

Structural Investigation and Anti-Stokes Emission of Scandium Oxide Nanocrystals Activated with Trivalent Erbium

Upconversion assisted self-pulsing in a high-concentration erbium doped fibre laser

Rare Earth Doped Confined Structures for Lasers and Amplifiers

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