Upconversion of IR Radiation in a KGd(WO4)2 Crystal on Erbium and Thulium Ions in Trace Concentrations: Change of Excitation Schemes and Energy Transfer Through the Crystal Lattice

Ходасевич, И. А.; Корниенко, А. А.; Першукевич, П. П.; Асеев, В. А.; Ходасевич, М. А.; Grabtchikov, A. S.

doi:10.1007/s10812-018-0575-y

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…3 (+ points) shows that for different segments of the curve, in the Log-Log representation of this dependency, the parameter depicting the slope is n ≈ 1.5, 3.2 and 2.1, respectively. For the initial and end parts of the curve, n ≈ 2, which indicates the excitation of green emission by 2 pump photons [23], while in intermediate region parameter n is more than three, as it is usually observed, when a photon avalanche occurs [11,14]. However this behavior cannot be caused by the excitation of a photon avalanche, since the concentration of erbium ions is insufficient for an efficient exchange of energy between them.…”

Section: Resultsmentioning

confidence: 83%

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Avalanche-like behavior of up-conversion luminescence by nonlinear coupling of pumping rates

Korolkov¹,

Ходасевич²,

Grabtchikov³

et al. 2019

Opt. Lett.

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Here we report and discuss the avalanche-like upconversion behavior in absence of the avalanche. We experimentally observed significant changes in the slope of the curve for the intensity dependence of up-conversion luminescence of erbium ions in green band (520-560 nm) on the pump intensity of the diode laser. Such changes are typical for the photon avalanche. However, the concentration of erbium ions is insufficient for an efficient exchange of energy between them, and the excitation of a photon avalanche is not possible. Using a simple threelevel approximation of the up-conversion process model, we have shown that the observed avalanche-like luminescence process can also occur in the absence of a photon avalanche due to the non-linear relation between the efficiency of two pumping channels of erbium ion caused by intensity dependence of the absorption.

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Section: Resultsmentioning

confidence: 83%

“…, with parameters W32=23800 c -1 , W31=2300 c -1 and W21=100c -1 specific for Er 3+ :KGW [22][23][24][25]. All numerical calculations presented in the article are performed with these parameter values.…”

Section: Modelmentioning

confidence: 99%

Avalanche-like behavior of up-conversion luminescence by nonlinear coupling of pumping rates

Korolkov¹,

Ходасевич²,

Grabtchikov³

et al. 2019

Opt. Lett.

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Upconversion Luminescence of Er3+ Ions from Barium Titanate Xerogel Powder and Target Fabricated by Explosive Compaction Method

Гапоненко

Судник²,

Vityaz³

et al. 2022

J Appl Spectrosc

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Non-stationary testing of avalanche-like behavior of up-conversion luminescence

Korolkov¹

2020

J. Opt. Soc. Am. B

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Nonlinear coupling of pumping rates in pump channels can produce effects very similar to the photon avalanche in up-conversion luminescence in the absence of a true avalanche. Stationary luminescence intensity can depend on the pump intensity practically in the same way. Here we show that time-dynamics for true avalanche and for avalanche-like processes are drastically different. Based on measuring the development times of stationary luminescence for several pump intensities, a simple test is proposed to reveal the nonlinear process underlying the observed avalanche-like effect.

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Upconversion of IR Radiation in a KGd(WO4)2 Crystal on Erbium and Thulium Ions in Trace Concentrations: Change of Excitation Schemes and Energy Transfer Through the Crystal Lattice

Cited by 4 publications

References 31 publications

Avalanche-like behavior of up-conversion luminescence by nonlinear coupling of pumping rates

Avalanche-like behavior of up-conversion luminescence by nonlinear coupling of pumping rates

Upconversion Luminescence of Er3+ Ions from Barium Titanate Xerogel Powder and Target Fabricated by Explosive Compaction Method

Non-stationary testing of avalanche-like behavior of up-conversion luminescence

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