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Effect of sample dimensions on observed photoluminescence from Er3+ ions in GeGaS and LaGaS glass hosts

Effect of sample dimensions on observed photoluminescence from Er3+ ions in GeGaS and LaGaS glass hosts
Effect of sample dimensions on observed photoluminescence from Er3+ ions in GeGaS and LaGaS glass hosts
The 4I9/2 - 4I13/2 emission band of trivalent Er3+ is potentially interesting light source for methane (CH4) detection because of its closeness to CH4 absorption band at 1.67 µm. In the present paper we report the influence of glass sample geometry on the shape of spectra and relative emission intensity of 4I9/2 - 4I13/2 band as well as three main 4I13/2 - 4I15/2 , 4I11/2 - 4I15/2 and 4I9/2 - 4I15/2 emission bands in sulfide glasses (GeGaS and LaGaS) doped with 0.5 at.% of Er. We show that the increase of sample size leads to a significant broadening of emission spectra as well as to the substantial suppression of 4I13/2 - 4I15/2 and 4I11/2 - 4I15/2 bands. The observed effects are explained by excitation diffusion or photon trapping (consecutive absorption and emission of light by Er3+ ions [1,2]) which turns out to be more effective in large samples. We present the results of Monte-Carlo simulations supporting our considerations and we discuss the possibility of increasing the 4I9/2 - 4I13/2 emission by controlling photon trapping.
Koughia, C.
7ebf0ea5-50e3-45df-914d-4b99c9fbe8ba
Craig, C.
2328b42b-552e-4a82-941d-45449e952f10
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0
Kasap, S.
880afbe7-a1be-468f-97ac-7ef22bb469d5
Koughia, C.
7ebf0ea5-50e3-45df-914d-4b99c9fbe8ba
Craig, C.
2328b42b-552e-4a82-941d-45449e952f10
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0
Kasap, S.
880afbe7-a1be-468f-97ac-7ef22bb469d5

Koughia, C., Craig, C., Hewak, D.W. and Kasap, S. (2014) Effect of sample dimensions on observed photoluminescence from Er3+ ions in GeGaS and LaGaS glass hosts. ICOOPMA '14: Sixth International Conference on Optical, Optoelectronic and Photonic Materials and Applications, Leeds, United Kingdom. 26 Jul - 30 Aug 2014.

Record type: Conference or Workshop Item (Paper)

Abstract

The 4I9/2 - 4I13/2 emission band of trivalent Er3+ is potentially interesting light source for methane (CH4) detection because of its closeness to CH4 absorption band at 1.67 µm. In the present paper we report the influence of glass sample geometry on the shape of spectra and relative emission intensity of 4I9/2 - 4I13/2 band as well as three main 4I13/2 - 4I15/2 , 4I11/2 - 4I15/2 and 4I9/2 - 4I15/2 emission bands in sulfide glasses (GeGaS and LaGaS) doped with 0.5 at.% of Er. We show that the increase of sample size leads to a significant broadening of emission spectra as well as to the substantial suppression of 4I13/2 - 4I15/2 and 4I11/2 - 4I15/2 bands. The observed effects are explained by excitation diffusion or photon trapping (consecutive absorption and emission of light by Er3+ ions [1,2]) which turns out to be more effective in large samples. We present the results of Monte-Carlo simulations supporting our considerations and we discuss the possibility of increasing the 4I9/2 - 4I13/2 emission by controlling photon trapping.

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Published date: 2014
Venue - Dates: ICOOPMA '14: Sixth International Conference on Optical, Optoelectronic and Photonic Materials and Applications, Leeds, United Kingdom, 2014-07-26 - 2014-08-30
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 370154
URI: http://eprints.soton.ac.uk/id/eprint/370154
PURE UUID: 8cd10566-f854-4ce5-a5d5-4f7adc3600ca
ORCID for C. Craig: ORCID iD orcid.org/0000-0001-6919-4294
ORCID for D.W. Hewak: ORCID iD orcid.org/0000-0002-2093-5773

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Date deposited: 23 Oct 2014 14:12
Last modified: 11 Jul 2020 00:33

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