The riddle of orange–red luminescence in Bismuth-doped silica glasses

Abstract For over the past two decades it has been believed that the intense orange-red photoluminescence in Bismuth-doped materials originates from Bi $$^{2+}$$ 2 + ions. Based on the results from magnetic circular polarization experiments, we demonstrate that this hypothesis fails for Bismuth-dope...

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Autores principales:	Oleksii V. Laguta, Igor M. Razdobreev
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/183b1fd66dbd4458a1cd68ee1e4fbd39
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spelling	oai:doaj.org-article:183b1fd66dbd4458a1cd68ee1e4fbd392021-12-02T18:15:25ZThe riddle of orange–red luminescence in Bismuth-doped silica glasses10.1038/s41598-021-87290-z2045-2322https://doaj.org/article/183b1fd66dbd4458a1cd68ee1e4fbd392021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87290-zhttps://doaj.org/toc/2045-2322Abstract For over the past two decades it has been believed that the intense orange-red photoluminescence in Bismuth-doped materials originates from Bi $$^{2+}$$ 2 + ions. Based on the results from magnetic circular polarization experiments, we demonstrate that this hypothesis fails for Bismuth-doped silica glasses. Our findings contradict the generally accepted statement that the orange-red luminescence arises from $$^{2}P_{3/2}(1)$$ 2 P 3 / 2 ( 1 ) $$\rightarrow$$ → $$^{2}P_{1/2}$$ 2 P 1 / 2 transition in a divalent Bismuth ion. The degree of magnetic circular polarization of this luminescence exhibits non-monotonic temperature and field dependencies, as well as sign reversal. This complex behaviour cannot be explained under the assumption of a single Bi $$^{2+}$$ 2 + ion. The detailed analysis enables us to construct a consistent diagram of energy levels involved in the magneto-optical experiments and propose a new interpretation of the nature of orange-red luminescence in Bismuth-doped silica glass. A centre responsible for this notorious photoluminescence must be an even-electron system with an integer total spin, presumably a dimer of Bismuth ions or a complex consisting of Bi $$^{2+}$$ 2 + and an oxygen vacancy.Oleksii V. LagutaIgor M. RazdobreevNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Oleksii V. Laguta Igor M. Razdobreev The riddle of orange–red luminescence in Bismuth-doped silica glasses
description	Abstract For over the past two decades it has been believed that the intense orange-red photoluminescence in Bismuth-doped materials originates from Bi $$^{2+}$$ 2 + ions. Based on the results from magnetic circular polarization experiments, we demonstrate that this hypothesis fails for Bismuth-doped silica glasses. Our findings contradict the generally accepted statement that the orange-red luminescence arises from $$^{2}P_{3/2}(1)$$ 2 P 3 / 2 ( 1 ) $$\rightarrow$$ → $$^{2}P_{1/2}$$ 2 P 1 / 2 transition in a divalent Bismuth ion. The degree of magnetic circular polarization of this luminescence exhibits non-monotonic temperature and field dependencies, as well as sign reversal. This complex behaviour cannot be explained under the assumption of a single Bi $$^{2+}$$ 2 + ion. The detailed analysis enables us to construct a consistent diagram of energy levels involved in the magneto-optical experiments and propose a new interpretation of the nature of orange-red luminescence in Bismuth-doped silica glass. A centre responsible for this notorious photoluminescence must be an even-electron system with an integer total spin, presumably a dimer of Bismuth ions or a complex consisting of Bi $$^{2+}$$ 2 + and an oxygen vacancy.
format	article
author	Oleksii V. Laguta Igor M. Razdobreev
author_facet	Oleksii V. Laguta Igor M. Razdobreev
author_sort	Oleksii V. Laguta
title	The riddle of orange–red luminescence in Bismuth-doped silica glasses
title_short	The riddle of orange–red luminescence in Bismuth-doped silica glasses
title_full	The riddle of orange–red luminescence in Bismuth-doped silica glasses
title_fullStr	The riddle of orange–red luminescence in Bismuth-doped silica glasses
title_full_unstemmed	The riddle of orange–red luminescence in Bismuth-doped silica glasses
title_sort	riddle of orange–red luminescence in bismuth-doped silica glasses
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/183b1fd66dbd4458a1cd68ee1e4fbd39
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The riddle of orange–red luminescence in Bismuth-doped silica glasses

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