Broadband fluorescence emission of Eu3+ doped germanotellurite glasses for fiber-based irradiation light sources
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Original language | English |
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Pages (from-to) | 1931-1943 |
Journal / Publication | Optical Materials Express |
Volume | 3 |
Issue number | 11 |
Publication status | Published - 2013 |
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-84888073275&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(72258eb1-ab46-4f2d-b2f6-10c229186396).html |
Abstract
Eu3+ doped fiber-based germanotellurite (NZPGT) glasses with medium-low maximum phonon energy of 782 cm-1 have been fabricated and characterized. Judd-Ofelt intensity parameters Ω2 (6.25 × 10-20 cm2) and Ω4 (1.77 × 10-20 cm2) indicate a high asymmetrical and covalent environment around Eu3+ in the optical glasses. The spontaneous emission probability of the dominant transition 5D0→7F2 peaking at 612.5 nm and the corresponding maximum stimulated emission cross-section were derived to be 445.7 s-1 and 2.05 × 10-21 cm2, respectively, confirming the effectiveness of the red fluorescence emission. The quantum yield was derived to be 12% under 391 nm LED excitation, and approximately 88% photons have been demonstrated in wavelength range of 600-720 nm, indicating that Eu3+ doped NZPGT glasses under proper excitation conditions are promising optical materials for fiber-based irradiation light sources that are competent to activate diverse photodynamic therapy photosensitizers. © 2013 Optical Society of America.
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Broadband fluorescence emission of Eu3+ doped germanotellurite glasses for fiber-based irradiation light sources. / Wang, F.; Shen, L. F.; Chen, B. J. et al.
In: Optical Materials Express, Vol. 3, No. 11, 2013, p. 1931-1943.
In: Optical Materials Express, Vol. 3, No. 11, 2013, p. 1931-1943.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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