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Radiation trapping in selected Er3+ doped chalcogenide glasses and the extraction of the nonradiative lifetime

Radiation trapping in selected Er3+ doped chalcogenide glasses and the extraction of the nonradiative lifetime
Radiation trapping in selected Er3+ doped chalcogenide glasses and the extraction of the nonradiative lifetime
Radiation trapping (RT) is a phenomenon wherein photons are emitted, absorbed and re-emitted many times before they leave the volume of the material. Trivalent Er3+ ions are particularly prone to RT because there is a whole set of strongly overlapping emission and absorption bands including  4I13/24I15/2 and 4I11/24I15/2 bands. The effect of RT on the PL decay time was investigated experimentally in this work in a variety of Er3+-doped GeGaS, GeGaSe, GaLaS(O) glasses. Sample geometry (powders, plates, disks, cylinders) and size were varied and the samples were also immersed in glycol, a liquid with high refractive index. PL decay times were measured and compared with the Judd-Ofelt results. A simple model of RT was developed and applied to the above mentioned bands. By comparing model conclusions with experimental data for different sample sizes, we were able to separate the direct relaxation of the 4I11/2 state to ground 4I15/2 state and relaxation via the intermediate 4I13/2 state; and hence obtain an approximate nonradiative lifetime.
2368-2375
Koughia, Cyril
37124915-791f-4fce-a25c-ab63dd4862c2
Craig, Christopher
2328b42b-552e-4a82-941d-45449e952f10
Hewak, Daniel
87c80070-c101-4f7a-914f-4cc3131e3db0
Kasap, Safa
110ef74c-2ab0-422a-9bb5-051154e7ca24
Koughia, Cyril
37124915-791f-4fce-a25c-ab63dd4862c2
Craig, Christopher
2328b42b-552e-4a82-941d-45449e952f10
Hewak, Daniel
87c80070-c101-4f7a-914f-4cc3131e3db0
Kasap, Safa
110ef74c-2ab0-422a-9bb5-051154e7ca24

Koughia, Cyril, Craig, Christopher, Hewak, Daniel and Kasap, Safa (2019) Radiation trapping in selected Er3+ doped chalcogenide glasses and the extraction of the nonradiative lifetime. Optical Materials Express, 9 (5), 2368-2375. (doi:10.1364/OME.9.002368).

Record type: Article

Abstract

Radiation trapping (RT) is a phenomenon wherein photons are emitted, absorbed and re-emitted many times before they leave the volume of the material. Trivalent Er3+ ions are particularly prone to RT because there is a whole set of strongly overlapping emission and absorption bands including  4I13/24I15/2 and 4I11/24I15/2 bands. The effect of RT on the PL decay time was investigated experimentally in this work in a variety of Er3+-doped GeGaS, GeGaSe, GaLaS(O) glasses. Sample geometry (powders, plates, disks, cylinders) and size were varied and the samples were also immersed in glycol, a liquid with high refractive index. PL decay times were measured and compared with the Judd-Ofelt results. A simple model of RT was developed and applied to the above mentioned bands. By comparing model conclusions with experimental data for different sample sizes, we were able to separate the direct relaxation of the 4I11/2 state to ground 4I15/2 state and relaxation via the intermediate 4I13/2 state; and hence obtain an approximate nonradiative lifetime.

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Optical_Materials_Express_March28 (revised)(final and accepted) - Accepted Manuscript
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Radiation trapping in selected Er3+ doped chalcogenide glasses and the extraction of the nonradiative lifetime - Version of Record
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More information

Accepted/In Press date: 30 March 2019
e-pub ahead of print date: 29 April 2019
Published date: May 2019

Identifiers

Local EPrints ID: 431373
URI: http://eprints.soton.ac.uk/id/eprint/431373
PURE UUID: d1aa86ec-5a35-48f6-b2dd-ce0d420a3687
ORCID for Christopher Craig: ORCID iD orcid.org/0000-0001-6919-4294
ORCID for Daniel Hewak: ORCID iD orcid.org/0000-0002-2093-5773

Catalogue record

Date deposited: 30 May 2019 16:30
Last modified: 07 Oct 2020 02:01

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