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Multifunctional tunable ultra-broadband visible and near-infrared luminescence from bismuth-doped germanate glasses
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10.1063/1.4791698
/content/aip/journal/jap/113/8/10.1063/1.4791698
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/8/10.1063/1.4791698
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Figures

Image of FIG. 1.
FIG. 1.

(a) NIR PL spectra of Bi-doped glasses with various bismuth concentrations melted in air at 1500 °C, (b) NIR PL spectra of 1.0 mol. % Bi-doped glasses melted in air at various temperatures. All the spectra are excited by 880 nm.

Image of FIG. 2.
FIG. 2.

NIR PL spectra of various concentrations of Bi-doped glasses prepared at 1500 °C in air, Ar and 95%N2/5%H2 (marked as NH) atmosphere, respectively: (a) 0.1 mol. %, (b) 0.5 mol. %, (c) 1.0 mol. %. All the spectra are excited by 880 nm.

Image of FIG. 3.
FIG. 3.

Absorption spectra of Bi-doped glasses melted in air at 1500 °C with various bismuth concentrations (the concentration is 0.1, 0.5, 1.0, 2.0, 4.0, and 6.0 mol. %, respectively). The inset is the ratio of the absorbance of the band at around 520 nm to that at 700 nm as a function of bismuth concentration.

Image of FIG. 4.
FIG. 4.

(a) PLE spectra of 1.0 mol. % Bi-doped glass melted in air at 1500 °C and monitored at 1080, 1260, and 1450 nm, respectively. The inset is the dependence of emission wavelengths on excitation wavelengths from 300 to 980 nm. (b) Fluorescence decay curves of 1.0 mol. % Bi-doped glass melted in air at 1500 °C. The excitation wavelengths are 540, 730, and 800 nm, and the corresponding emission wavelengths are 1080, 1260, and 1450 nm, respectively. The correlated coefficients for the fits by bi-expotential decay equation for this emission (1080 nm: I = 0.51952 e t /408.8 + 0.47049 e−t/129.5, 1260 nm: I = 0.54531 e−t/167.2 + 0.45922 e−t/514.5, 1450 nm: I = 0.43735 e−t/311.8 + 0.43972 e−t/80.3) are 0.9992, 0.9995, and 0.9958, respectively.

Image of FIG. 5.
FIG. 5.

ESR spectra of undoped, 0.1 and 1.0 mol. % Bi-doped glasses melted in air at 1500 °C.

Image of FIG. 6.
FIG. 6.

(a) and (b) Visible luminescence spectra of Bi-doped glasses melted in air at 1500 °C with various bismuth concentrations (0.1, 0.5, 1.0, and 2.0 mol. %) excited by 395 and 450 nm, respectively. (c) and (d) Visible luminescence spectra of 0.1 mol. % Bi-doped glasses melted in air, Ar and 95%N2/5%H2 atmosphere at 1500 °C, respectively. The excitation wavelengths are 395 and 450 nm, respectively.

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/content/aip/journal/jap/113/8/10.1063/1.4791698
2013-02-22
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Multifunctional tunable ultra-broadband visible and near-infrared luminescence from bismuth-doped germanate glasses
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/8/10.1063/1.4791698
10.1063/1.4791698
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