Spectroscopy and upconversion processes in YAlO3:Ho3+ crystals

Malinowski, M.; Piramidowicz, Ryszard; Frukacz, Z.; Chadeyron, G.; Mahiou, Rachid; Joubert, M.-F.

doi:10.1016/s0925-3467(98)00081-0

Cited by 75 publications

(44 citation statements)

References 44 publications

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“…It is important to note that these emissions have not been observed in other glass hosts 6 probably because their intensities were too small in those systems. In general, two mechanisms may lead to UPC emission: excited state absorption ͑ESA͒ and energy transfer ͑ET͒.…”

Section: Resultsmentioning

confidence: 97%

“…The lifetime of level 5 F 5 is large enough to allow significant ET between excited ions and two possible channels may populate level 5 F 3 via ET. 6 One channel is an indirect ET assisted UPC ͑ETAU͒ via 5 F 5 ϩ 5 F 5 → 5 I 7 ϩ( 3 K 7 , 5 G 4 ) with subsequent population decay to level 5 F 3 via multiphonon emission from levels 5 G 4 and 3 K 7 . The other channel is related to a direct ETAU via 5 F 5 ϩ 5 F 5 → 5 I 5 ϩ 5 F 3 .…”

Section: Resultsmentioning

confidence: 99%

“…4͒. 6 Again, the rate equations approach is used to estimate the cross-relaxation rates from level 5 S 2 through the following equations:…”

Section: Resultsmentioning

confidence: 99%

“…The optical properties of Ho 3ϩ in crystalline and amorphous environments have been studied, aimed at the operation of UPC lasers to be used in, for example, odonthological treatment. 4 Blue-green UPC luminescence owing to 4 f -4 f transitions of Ho 3ϩ has been observed upon visible and infrared excitation with efficiencies that are highly dependent on the host matrix [5][6][7][8] demonstrating the importance of studying UPC processes in different materials.…”

Section: Introductionmentioning

confidence: 99%

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Energy transfer assisted frequency upconversion in Ho3+ doped fluoroindate glass

Rakov

Maciel

Araújo

et al. 2002

Journal of Applied Physics

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Experimental results are reported which show a strong evidence of energy transfer between Ho 3ϩ ions in a fluoroindate glass excited by a pulsed laser operating at 640 nm. We identified the origin of the blue and green upconverted fluorescence observed as being due to a Ho 3ϩ -Ho 3ϩ pair interaction process. The dynamics of the fluorescence revealed the pathways involved in the energy transfer assisted upconversion process.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

“…4͒. 6 Again, the rate equations approach is used to estimate the cross-relaxation rates from level 5 S 2 through the following equations:…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Energy transfer assisted frequency upconversion in Ho3+ doped fluoroindate glass

Rakov

Maciel

Araújo

et al. 2002

Journal of Applied Physics

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“…These materials are also of considerable interest due to their magnetic and optical properties [4,5]. Gadolinium aluminum perovskites are a kind of ceramics based on the Ln 2 O 3 -Al 2 O 3 system (Lnlanthanide element) and they are promising materials for optical, electronic and structural applications [6][7][8]. Perovskite aluminates doped with a lanthanide element offer advantages of longer lifetimes and higher polarized cross sections in comparison to most other oxide matrices.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis and characterization of polycrystalline gadolinium aluminum perovskite (GdAlO₃, GAP)

Girish

Basavalingu

G.-Q.

et al. 2015

Materials Science-Poland

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Gadolinium aluminum perovskite (GdAlO 3 , GAP) is a promising high temperature ceramic material, known for its wide applications in phosphors. Polycrystalline gadolinium aluminum perovskites were synthesized using a precursor of co-precipitate gel of GdAlO 3 by employing hydrothermal supercritical fluid technique under pressure and temperature ranging from 150 to 200 MPa and 600 to 700°C, respectively. The resulted products of GAP were studied using the characterization techniques, such as powder X-ray diffraction analysis (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM) and energy dispersive analysis of X-ray (EDX). The X-ray diffraction pattern matched well with the reported orthorhombic GAP pattern (JCPDS-46-0395).

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A Ho³⁺‐Based Luminescent Thermometer for Sensitive Sensing over a Wide Temperature Range

Swieten

et al. 2020

Advanced Optical Materials

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on luminescence thermometry offers an alternative that is capable of measuring heat generation and diffusion on the microscopic scale. [3] Among the various choices of luminescent systems, [4-9] crystals doped with lanthanide (Ln 3+) ions represent a particularly promising class of luminescent thermometers, because their dimensions can be tuned from a few nanometers to several micrometers and their photoluminescence spectrum is sensitive to temperature. A characteristic feature of Ln 3+ ions is their rich energy level structure, which results in emission spectra with well-separated lines. Typically, the luminescence intensity ratio (LIR) between two of these emission lines is used as a sensitive measure for the temperature of the Ln 3+-doped crystal. After insertion of these ratiometric thermometers into a system of interest, remote operation simply involves excitation by light and detection of the luminescence with standard spectroscopic equipment. The performance of a ratiometric thermometer is determined by how sensitively the LIR reacts to temperature. In general, the performance at a given temperature (T) is quantified in terms of the relative sensitivity [10]

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Spectroscopy and upconversion processes in YAlO3:Ho3+ crystals

Cited by 75 publications

References 44 publications

Energy transfer assisted frequency upconversion in Ho3+ doped fluoroindate glass

Energy transfer assisted frequency upconversion in Ho3+ doped fluoroindate glass

Hydrothermal synthesis and characterization of polycrystalline gadolinium aluminum perovskite (GdAlO₃, GAP)

A Ho³⁺‐Based Luminescent Thermometer for Sensitive Sensing over a Wide Temperature Range

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Spectroscopy and upconversion processes in YAlO3:Ho3+ crystals

Cited by 75 publications

References 44 publications

Energy transfer assisted frequency upconversion in Ho3+ doped fluoroindate glass

Energy transfer assisted frequency upconversion in Ho3+ doped fluoroindate glass

Hydrothermal synthesis and characterization of polycrystalline gadolinium aluminum perovskite (GdAlO3, GAP)

A Ho3+‐Based Luminescent Thermometer for Sensitive Sensing over a Wide Temperature Range

Contact Info

Product

Resources

About

Hydrothermal synthesis and characterization of polycrystalline gadolinium aluminum perovskite (GdAlO₃, GAP)

A Ho³⁺‐Based Luminescent Thermometer for Sensitive Sensing over a Wide Temperature Range