The luminescence of glasses activated with terbium

Karapetyan, G. O.; Lunter, S. G.

doi:10.1007/bf00605833

Cited by 9 publications

(4 citation statements)

References 2 publications

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“…1). Similar EPR spectra were observed in a number of Cr-doped oxide glasses of different composition and chromium concentration [18][19][20][21]. Landry etal.…”

Section: The Cr 3+ Impurity Centressupporting

confidence: 56%

“…The experimental spectra obtained at 9.3 GHz for glasses of different compositions, which exhibit a pronounced derivative maximum at g~fr = 5.0 and a zero-crossing at g~er = 1.78 [18], were interpreted in [19] by performing an exact diagonalization of the fine structure term of Eq. (2), allowing the ratio [E/D [ to take on any value.…”

Section: The Cr 3+ Impurity Centresmentioning

confidence: 99%

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EPR study of the impurity paramagnetic centres in (CaO−Ga2O3−GeO2) glasses

Padlyak

Gutsze

1998

Appl. Magn. Reson.

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Abstraet. The X-band EPR spectra of Cr 3+, Mn 2+, and Fe 3+ impurity ions in glasses of (CaOGa203-GeO~) system are investigated in the 77-300 K temperature range. The experimental data analysis yields the following results: (i) Impurity chromium ions are incorporated into the (CaOGa203-GeO2) glasses network in Cr 3 § (3d 3, 4F3/2) paramagnetic valence state only and occupy the strong distorted oxygen coordinated octahedral sites. (ii) For all activated and non-activated (CaOGazO3-GeOz) glasses the iron impurity is present at concentration roughly 0.01 wt.%. Isotropic EPR signals at g~f~ = 4.29 and g~fr = 2.00 ate assigned to Fe 3+ (3d s, 6S5/2) ions in the sites with strong rhombic distortion and in the sites with nearly cubic symmetry respectively. (iii) The manganese EPR spectrum in (CaO-Ga202-GeO2) glasses is weakly dependent on temperature, doping procedure as well as manganese concentration. EPR spectra of impurity manganese ions in glasses with Ca3Ga2G%O12 and Ca3Ga2Ge40,4 compositions are virtually identieal and belong to Mn 2+ (3d 5, 6S5/2) ions. Impurity manganese ions are incorporated into the (CaO-Ga203-GeO2) glass network as isolated Mn 2+ centres and clusters of Mn 2+ ions.

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“…1). Similar EPR spectra were observed in a number of Cr-doped oxide glasses of different composition and chromium concentration [18][19][20][21]. Landry etal.…”

Section: The Cr 3+ Impurity Centressupporting

confidence: 56%

Section: The Cr 3+ Impurity Centresmentioning

confidence: 99%

EPR study of the impurity paramagnetic centres in (CaO−Ga2O3−GeO2) glasses

Padlyak

Gutsze

1998

Appl. Magn. Reson.

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“…Tb 4+ ions appear in spectral curves as a broad absorption band in a visible region. It is known that at small concentrations, Tb 2 O 3 in glasses is in the form of Tb 3+ that corresponds to complex absorption spectra composed of superposition of f-d and f-f transitions [21]. These two types of transitions are well identified in sodium silicate glass in which ground state of Tb 3+ ions lies in a forbidden gap of glass for a distance of ≈5.5 eV from a conducting band [22].…”

Section: Discussionmentioning

confidence: 99%

Borogermanate glasses with a high terbium oxide content

Savinkov

Сигаев

Golubev

et al. 2010

Journal of Non-Crystalline Solids

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“…[26][27][28] Then, terbium ions, which are a glass network modifier, will tend to move out of the hot region, which results in the aggregation of terbium ions around the hot region. Karpetyan and hunter 29) and Shulgin et al 30) studied the fine spectra of Tb 3+ -doped glass, and found that the luminescence at approximately 540 and 480 nm will tend to redshift with increasing concentration of Tb 3+ ions. We proposed that the environment of Tb 3+ ions was disturbed when the glass was exposed to the intense laser, resulting in terbium ion aggregation in the laser focus microarea.…”

Section: Resultsmentioning

confidence: 99%

High-efficiency simultaneous three-photon absorption upconversion luminescence of a terbium-doped germanate glass

Zhang

Yang

Zou

et al. 2016

Jpn. J. Appl. Phys.

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In this paper, high-efficiency green upconversion luminescence from a terbium (Tb3+)-doped germanate glass is reported. The upconversion luminescence involved a simultaneous three-photon absorption process. Compared with an emission spectrum excited at 377 nm, the upconversion luminescence bands of Tb3+ pumped by an fs laser showed a slight red-shift. This was ascribed to the redistribution of glass composition when the glass sample was exposed to the high-intensity laser, which results in the aggregation of Tb3+ around the laser-exposed focal region, which in turn results in the slight red-shift of luminescence. The upconversion luminescence intensities at 540, 590, and 620 nm strongly depended on the polarization angle of the femtosecond laser, which was ascribed to the different transmittances of a half-wavelength plate at different polarization angles, which results in the regularity change in fs laser power.

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The luminescence of glasses activated with terbium

Cited by 9 publications

References 2 publications

EPR study of the impurity paramagnetic centres in (CaO−Ga2O3−GeO2) glasses

EPR study of the impurity paramagnetic centres in (CaO−Ga2O3−GeO2) glasses

Borogermanate glasses with a high terbium oxide content

High-efficiency simultaneous three-photon absorption upconversion luminescence of a terbium-doped germanate glass

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