Augmented excitation cross section of gadolinium ions in nanostructured glasses

Roberto Lorenzi; Alberto Paleari; Vladimir N. Sigaev; Elena S. Ignat’eva; Nikita V. Golubev

doi:10.1364/OL.42.002419

Optics Letters
Vol. 42,
Issue 13,
pp. 2419-2422
(2017)
•https://doi.org/10.1364/OL.42.002419

Augmented excitation cross section of gadolinium ions in nanostructured glasses

Roberto Lorenzi, Alberto Paleari, Vladimir N. Sigaev, Elena S. Ignat’eva, and Nikita V. Golubev

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Roberto Lorenzi, Alberto Paleari, Vladimir N. Sigaev, Elena S. Ignat’eva, and Nikita V. Golubev, "Augmented excitation cross section of gadolinium ions in nanostructured glasses," Opt. Lett. 42, 2419-2422 (2017)

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Abstract

In this Letter, we present detailed absorption and emission data on nanostructured germanosilicate glasses and glass ceramics containing ${Ga}_{2} O_{3}$ nanophases and doped with Gd ions. The results show that these systems are suitable hosts for the enhancement of the excitation cross section of rare earth ions via energy transfer from the gallium oxide nanophase with a related quantum yield of 21%. The role of matrix composition and nanostructure morphology on the Gd emission is discussed.

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	Composition (mol%) $+ 0.1 {Gd}_{2} O_{3}$
Sample	${Ga}_{2} O_{3}$	${SiO}_{2}$	${GeO}_{2}$	${Li}_{2} O$	${Na}_{2} O$	Thermal Treatment
25/23G	25.0	23.5	42.2	7.0	2.3	As quenched
25/23GC	25.0	23.5	42.2	7.0	2.3	676°C, 15 min
20/35G	20.0	35.0	35.0	7.5	2.5	As quenched
20/35GC	20.0	35.0	35.0	7.5	2.5	694°C, 15 min
20/25G	20.0	25.0	45.0	7.5	2.5	As quenched
20/25GC	20.0	25.0	45.0	7.5	2.5	684°C, 15 min

	$f (\cdot 10^{8})$
Sample	${}^{6}{P_{7 / 2}}$	${}^{6}{I_{j}}$	$C_{Gd}$ (mM)	$τ_{0}$ (ms)	$τ$ (ms)	QY (%)
25/23G	15.8	218	64.4	3.64	2.53	70
25/23GC	15.7	n.d.	57.1	3.65	2.62	72
20/35G	20.5	156	74.8	2.79	2.87	103
20/35GC	17.2	173	70.8	3.33	2.99	90
20/25G	19.8	242	60.0	2.9	2.58	89
20/25GC	20.0	144	73.5	2.87	3.02	105

	Composition (mol%) $+ 0.1 {Gd}_{2} O_{3}$
Sample	${Ga}_{2} O_{3}$	${SiO}_{2}$	${GeO}_{2}$	${Li}_{2} O$	${Na}_{2} O$	Thermal Treatment
25/23G	25.0	23.5	42.2	7.0	2.3	As quenched
25/23GC	25.0	23.5	42.2	7.0	2.3	676°C, 15 min
20/35G	20.0	35.0	35.0	7.5	2.5	As quenched
20/35GC	20.0	35.0	35.0	7.5	2.5	694°C, 15 min
20/25G	20.0	25.0	45.0	7.5	2.5	As quenched
20/25GC	20.0	25.0	45.0	7.5	2.5	684°C, 15 min

	$f (\cdot 10^{8})$
Sample	${}^{6}{P_{7 / 2}}$	${}^{6}{I_{j}}$	$C_{Gd}$ (mM)	$τ_{0}$ (ms)	$τ$ (ms)	QY (%)
25/23G	15.8	218	64.4	3.64	2.53	70
25/23GC	15.7	n.d.	57.1	3.65	2.62	72
20/35G	20.5	156	74.8	2.79	2.87	103
20/35GC	17.2	173	70.8	3.33	2.99	90
20/25G	19.8	242	60.0	2.9	2.58	89
20/25GC	20.0	144	73.5	2.87	3.02	105

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