Three-photon phenomena in the upconversion luminescence of erbium–ytterbium-codoped phosphate glass

Song, Feng; Zhang, Guangyin; Shang, Meiru; Tan, Hao; Yang, Jia; Meng, Fanqi

doi:10.1063/1.1404996

Cited by 93 publications

(39 citation statements)

References 17 publications

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“…Er 3+ ions doped materials are well suited for upconversion. Most upconversion studies of Er-doped materials were focused on infrared laser excitation [1][2][3][4][5][6][7][8][9][10][11][12][13][14] because the intermediate levels 4 I 9/2 (around 12491 cm −1 ) and 4 I 11/2 (around 10276 cm −1 ) of Er 3+ ions can be conveniently populated by commercial low-cost high-power near-infrared laser diodes. However, the investigation of violet and blue upconversion under visible laser excitation is very scarce [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Blue upconversion of cubic Gd2O3:Er produced by green laser

Guo

Wang

et al. 2004

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Blue upconversion of cubic Gd2O3:Er produced by green laser

Guo

Wang

et al. 2004

Journal of Alloys and Compounds

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“…For Er 3+ bands at~525 nm ( 2 H 11/2 → 4 I 15/2 ) and~550 nm ( 4 S 3/2 → 4 I 15/2 ) values of n equal to 2.93 and 2.59, respectively, are obtained indicating that three photons are absorbed. Three photons are indeed observed for the green emission in Yb 3+ :Er 3+ [23][24][25]. Higher concentrations of Yb 3+ (20% molar ratio in our case) tend to activate the three-photon process to populate levels 2 H 11/2 and 4 S 3/2 .…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 64%

Infrared to Visible Up-conversion in Biocellulose–yttrium Vanadate Nanoparticle Composite Membranes. Demonstration of Chloroaluminum Phthalocyanine Light Emission Under Up-converted Light Excitation

Nigoghossian¹,

Peres²,

Primo³

et al. 2014

Colloids and Interface Science Communications

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Biocellulose Chloroaluminum phthalocyanine Yttrium vanadate nanoparticles lanthanide ions photodynamic therapy photosensitizers drug delivery systems biomaterials composite membranes YVO 4 :(Yb 3+ -Er 3+ /Ho 3+ ) nanoparticles were incorporated in biocellulose membranes obtained from Gluconacetobacter xylinus. Materials present the property of converting near-infrared (NIR) into higher-energy visible light. Nanoparticles were prepared by optimizing towards higher emission intensity at the absorption wavelength range of chloroaluminum phthalocyanine (ClAlPc) used as a photosensitizer in the photodynamic therapy. The NIR excitation wavelength is advantageous for biological applications, as it allows deeper penetration into tissues than the UV-visible radiation commonly used for luminescence excitation. Up-conversion emission spectra obtained under excitation at 980 nm showed a preferential green emission for the Yb 3+ -Er 3+ system and a red emission for the Yb 3+ -Ho 3+ one. In the last case, by using mixtures of nanoparticles and ClAlPc the red emission (680 nm) of the phtalocyanine was observed through excitation by the up-converted emission of the nanoparticles (650 nm) which were excited in NIR (980 nm).

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“…A mixing upconversion excitation phenomenon of green fluorescence was observed, and the similar phenomenon was discovered and discussed only in high phonon-energy glasses and crystals before [29][30][31][32][33][34][35]. To further expose the characteristic of green light, the differentiation between 2 H 11/2 → 4 I 15/2 and 4 S 3/2 → 4 I 15/2 emission transitions was detailed investigated.…”

Section: Introductionmentioning

confidence: 95%