Tailoring the 4I9/2 -> 4I13/2 emission in Er3+ ions in different hosts media
Tailoring the 4I9/2 -> 4I13/2 emission in Er3+ ions in different hosts media
The 4I9/2 -> 4I13/2 emission band of Er3+ is potentially interesting for CH4 detection because it can overlap with the optical absorption band of CH4. GaLaS and GeGaS glasses doped with Er3+ ions show the desirable emission under 808 nm excitation. An attempt of spectrally shifting 4I9/2 -> 4I13/2 emission band by substituting S by O or Se to obtain a perfect match to the absorption band of CH4 leads to the weakening and disappearance of the 4I9/2 -> 4I13/2 band. This phenomenon is tentatively related to the acceleration of non-radiative relaxation in the case of oxygen addition and to the suppression of up-conversion in the selenium substitution case. The relative intensity of the 4I9/2 -> 4I13/2 band (with respect to the 4I13/2 -> 4I15/2 band) varies significantly in powdered and bulk materials. This effect is discussed in terms of the radiation diffusion (i.e. radiation trapping) model and is confirmed by Monte-Carlo simulations.
116-121
Koughia, Cyril
5e08988b-868a-4611-bbd1-69cba1fa869b
Craig, Chris
2328b42b-552e-4a82-941d-45449e952f10
Hewak, Daniel W.
87c80070-c101-4f7a-914f-4cc3131e3db0
Kasap, Safa
79213b1c-6188-4d7c-bd6f-f89bb6d20df8
March 2015
Koughia, Cyril
5e08988b-868a-4611-bbd1-69cba1fa869b
Craig, Chris
2328b42b-552e-4a82-941d-45449e952f10
Hewak, Daniel W.
87c80070-c101-4f7a-914f-4cc3131e3db0
Kasap, Safa
79213b1c-6188-4d7c-bd6f-f89bb6d20df8
Koughia, Cyril, Craig, Chris, Hewak, Daniel W. and Kasap, Safa
(2015)
Tailoring the 4I9/2 -> 4I13/2 emission in Er3+ ions in different hosts media.
Optical Materials, 41, .
(doi:10.1016/j.optmat.2014.09.013).
Abstract
The 4I9/2 -> 4I13/2 emission band of Er3+ is potentially interesting for CH4 detection because it can overlap with the optical absorption band of CH4. GaLaS and GeGaS glasses doped with Er3+ ions show the desirable emission under 808 nm excitation. An attempt of spectrally shifting 4I9/2 -> 4I13/2 emission band by substituting S by O or Se to obtain a perfect match to the absorption band of CH4 leads to the weakening and disappearance of the 4I9/2 -> 4I13/2 band. This phenomenon is tentatively related to the acceleration of non-radiative relaxation in the case of oxygen addition and to the suppression of up-conversion in the selenium substitution case. The relative intensity of the 4I9/2 -> 4I13/2 band (with respect to the 4I13/2 -> 4I15/2 band) varies significantly in powdered and bulk materials. This effect is discussed in terms of the radiation diffusion (i.e. radiation trapping) model and is confirmed by Monte-Carlo simulations.
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Published date: March 2015
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(Presented at the 5th International Workshop on Photoluminescence in Rare Earths (PRE’14): Photonic Materials and Devices, May 13–16, 2014, San Sebastian, Spain)
Organisations:
Optoelectronics Research Centre
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Local EPrints ID: 372225
URI: http://eprints.soton.ac.uk/id/eprint/372225
PURE UUID: acfeec5a-abc8-4fec-994f-9f697fd08806
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Date deposited: 03 Dec 2014 15:44
Last modified: 15 Mar 2024 03:42
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Author:
Cyril Koughia
Author:
Safa Kasap
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