Infrared-to-visible frequency upconversion in SrAl2O4 powders containing Er3+ and Yb3+

Rakov, Nikifor; Guimarães, R. B.; Maciel, Glauco S.

doi:10.1007/s00340-009-3733-3

Cited by 11 publications

(5 citation statements)

References 17 publications

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“…[ 204 ] Apart from these recent developments, usage of Judd‐Ofelt theory to estimate the preconstant C was only occasionally reported. [ 221–223 ]…”

Section: Thermodynamic Perspective—optimization Of Thermometry With Tmentioning

confidence: 99%

A Theoretical Framework for Ratiometric Single Ion Luminescent Thermometers—Thermodynamic and Kinetic Guidelines for Optimized Performance

Suta

Meijerink

2020

Advcd Theory and Sims

209

191

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Luminescence (nano)thermometry is an increasingly important field for remote temperature sensing with high spatial resolution. Most typically, ratiometric sensing of the luminescence emission intensities of two thermally coupled emissive states based on a Boltzmann equilibrium is used to detect the local temperature. Dependent on the temperature range and preferred spectral window, various choices for potential candidates appear possible. Despite extensive experimental research in the field, a universal theory covering the basics of luminescence thermometry is virtually nonexistent. In this manuscript, a general theoretical framework of single ion luminescent thermometers is presented that offers simple, user-friendly guidelines for both the choice of an appropriate emitter and respective embedding host material for optimum temperature sensing. The results show that the optimum performance (thermal response and sensitivity) around T 0 is realized for an energy gap ∆E 21 between thermally coupled levels between 2k B T 0 and 3.41k B T 0. Analysis of the temperature-dependent excited state kinetics shows that host lattices in which ∆E 21 can be bridged by one or two phonons are preferred over hosts in which higher order phonon processes are required. Such a framework is relevant for both a fundamental understanding of luminescent thermometers but also the targeted design of novel and superior luminescent (nano)thermometers.

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“…[ 204 ] Apart from these recent developments, usage of Judd‐Ofelt theory to estimate the preconstant C was only occasionally reported. [ 221–223 ]…”

Section: Thermodynamic Perspective—optimization Of Thermometry With Tmentioning

confidence: 99%

A Theoretical Framework for Ratiometric Single Ion Luminescent Thermometers—Thermodynamic and Kinetic Guidelines for Optimized Performance

Suta

Meijerink

2020

Advcd Theory and Sims

209

191

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“…Until now, the mechanism of the PSUC of LPLMs has been proved to be de-trapping of carriers trapped in the traps at room temperature, i.e., the electrons in deep traps are promoted up into the conduction band of LPLMs by longer wavelength light, and then captured by an emitting center, usually Eu 2+ or Eu 3+ , to yield shorter wavelength emission [11][12][13]. However, the exact depth and distribution of the traps in the band gap of a LPLM have not been well determined yet.…”

Section: Introductionmentioning

confidence: 99%

“…Beside the persistent luminescence properties, LPLMs are reported to exhibit mechanoluminescence and photo-stimulated up-conversion (PSUC) properties [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Background illumination enhanced photo-stimulated up-conversion emission in persistent luminescent SrAl2O4:(Eu2+, Dy3+)

Bao

Mao

et al. 2015

Ceramics International

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“…Since the early days of the upconversion research [8], a variety of phosphors have been developed by doping rare earth elements in crystals (powders) [9][10][11], glass ceramics [12], glasses [13,14], or glass fibers (waveguides) [15,16]. Most phosphors emit green or red light, and some emit violet [17] or white (red-green-blue, RGB) light [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Two-way wavelength conversion for visible and infrared signal pulses

Saito

Kimura

Nakamura

2014

Journal of Luminescence

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Two-way wavelength conversion was achieved for visible and infrared signal pulses by using a phosphorescent disk. When a visible (530 nm) or infrared (980 nm) laser beam was focused on the disk, absorbed photons created bright spots that emitted both visible and infrared phosphorescence (upconversion and downconversion). Although the phosphorescence lasted for 1 ms, a pulse signal of 1 MHz (1 μs period) was detected successfully by circulating the bright spots on the disk (a time-space conversion method). In comparison with downconversion, upconversion was easier to achieve for high-frequency signals, since the two-photon absorption process prevented overlapping of adjacent spots by restricting the phosphorescence spot size. Highlights: Two-way wavelength conversion was achieved for visible and infrared optical pulses. A single all-optical device realized both upconversion and downconversion. A time-space conversion method was used to create short pulses from phosphorescence. Pulse signals of 1 MHz were converted successfully by rotating a phosphorescent disk.

show abstract

Infrared-to-visible frequency upconversion in SrAl2O4 powders containing Er3+ and Yb3+

Cited by 11 publications

References 17 publications

A Theoretical Framework for Ratiometric Single Ion Luminescent Thermometers—Thermodynamic and Kinetic Guidelines for Optimized Performance

A Theoretical Framework for Ratiometric Single Ion Luminescent Thermometers—Thermodynamic and Kinetic Guidelines for Optimized Performance

Background illumination enhanced photo-stimulated up-conversion emission in persistent luminescent SrAl2O4:(Eu2+, Dy3+)

Two-way wavelength conversion for visible and infrared signal pulses

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