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Fluorescence quantum efficiency measurements of excitation and nonradiative deexcitation processes of rare earth 4f-states in chalcogenide glasses

Fluorescence quantum efficiency measurements of excitation and nonradiative deexcitation processes of rare earth 4f-states in chalcogenide glasses
Fluorescence quantum efficiency measurements of excitation and nonradiative deexcitation processes of rare earth 4f-states in chalcogenide glasses
Thermal lens spectroscopic measurements were performed to quantitatively determine the fluorescence quantum efficiency (eta) of different luminescence mechanisms in Nd3+ chalcogenide glasses. Low energy (<1.7 eV) direct resonant pumping at Nd3+ infrared lines resulted in eta ~1. High energy (~2.4 eV) indirect excitation via energy transfer (ET) from glass conduction band to Nd3+ 4f states, resulted in eta = ~0.4 (ET probability ~40%). A minimum eta ~0.2 was obtained for intermediate excitation energies (~2.2 eV) and attributed to back ET from the Nd3+ 4f state to the glass host.
0003-6951
589-591
Lima, S.M.
812be72f-4727-4840-a24e-9290494b2312
De Camargo, A.S.S.
26fb83ef-db35-4b9d-8d7f-218cc4d09ea3
Nunes, L.A.de Oliveira
6edba704-48dd-4b8a-8a19-dcfee971191b
Catunda, T.
e7766980-832d-4681-a215-95def8fe3e00
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0
Lima, S.M.
812be72f-4727-4840-a24e-9290494b2312
De Camargo, A.S.S.
26fb83ef-db35-4b9d-8d7f-218cc4d09ea3
Nunes, L.A.de Oliveira
6edba704-48dd-4b8a-8a19-dcfee971191b
Catunda, T.
e7766980-832d-4681-a215-95def8fe3e00
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0

Lima, S.M., De Camargo, A.S.S., Nunes, L.A.de Oliveira, Catunda, T. and Hewak, D.W. (2002) Fluorescence quantum efficiency measurements of excitation and nonradiative deexcitation processes of rare earth 4f-states in chalcogenide glasses. Applied Physics Letters, 81 (4), 589-591. (doi:10.1063/1.1495879).

Record type: Article

Abstract

Thermal lens spectroscopic measurements were performed to quantitatively determine the fluorescence quantum efficiency (eta) of different luminescence mechanisms in Nd3+ chalcogenide glasses. Low energy (<1.7 eV) direct resonant pumping at Nd3+ infrared lines resulted in eta ~1. High energy (~2.4 eV) indirect excitation via energy transfer (ET) from glass conduction band to Nd3+ 4f states, resulted in eta = ~0.4 (ET probability ~40%). A minimum eta ~0.2 was obtained for intermediate excitation energies (~2.2 eV) and attributed to back ET from the Nd3+ 4f state to the glass host.

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Published date: 2002

Identifiers

Local EPrints ID: 13748
URI: http://eprints.soton.ac.uk/id/eprint/13748
ISSN: 0003-6951
PURE UUID: 78846fb0-1082-4df0-9882-b30ae8e70122
ORCID for D.W. Hewak: ORCID iD orcid.org/0000-0002-2093-5773

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Date deposited: 01 Jan 2005
Last modified: 17 Dec 2019 02:00

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