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Tailoring the 4I9/2 -> 4I13/2 emission in Er3+ ions

Tailoring the 4I9/2 -> 4I13/2 emission in Er3+ ions
Tailoring the 4I9/2 -> 4I13/2 emission in Er3+ ions
Many gas detection techniques rely on the absorption of light by specific absorption bands of the gas molecules. For example, methane (CH4) has two strong absorption bands around 3.3 and 1.67 µm. The latter band seems to overlap the 4I9/2 -> 4I13/2 emission band of trivalent Er3+, as shown in Figure 1; Er3+ is, of course, a popular rare-earth ion used various photonic device applications, including erbium doped optical fiber amplifier. In the present paper, we report that in some sulfide glasses (GeGaS and LaGaS) doped with 0.5 at.% of Er, the amplitude of 4I9/2 -> 4I13/2 emission band may reach up to 5% of the major 4I13/2 -> 4I15/2 emission band as shown in Figure 2. We investigate the possibility to "tailor" the 4I9/2 -> 4I13/2 emission band of trivalent Er3+ to better match the CH4 absorption band. In particular, we examined the possibility of spectral shift by using a nephelauxetic effect by substituting for sulfur with oxygen or selenium. Surprisingly, these substitutions suppress the 4I9/2 -> 4I13/2 emission band rather than shift it. The present paper also discusses the possible mechanisms for this suppression.
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) Tailoring the 4I9/2 -> 4I13/2 emission in Er3+ ions. 5th International Workshop on Photoluminescence in Rare Earths (PRE'14): Photonic materials and devices, Spain. 14 - 16 May 2014. 1 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Many gas detection techniques rely on the absorption of light by specific absorption bands of the gas molecules. For example, methane (CH4) has two strong absorption bands around 3.3 and 1.67 µm. The latter band seems to overlap the 4I9/2 -> 4I13/2 emission band of trivalent Er3+, as shown in Figure 1; Er3+ is, of course, a popular rare-earth ion used various photonic device applications, including erbium doped optical fiber amplifier. In the present paper, we report that in some sulfide glasses (GeGaS and LaGaS) doped with 0.5 at.% of Er, the amplitude of 4I9/2 -> 4I13/2 emission band may reach up to 5% of the major 4I13/2 -> 4I15/2 emission band as shown in Figure 2. We investigate the possibility to "tailor" the 4I9/2 -> 4I13/2 emission band of trivalent Er3+ to better match the CH4 absorption band. In particular, we examined the possibility of spectral shift by using a nephelauxetic effect by substituting for sulfur with oxygen or selenium. Surprisingly, these substitutions suppress the 4I9/2 -> 4I13/2 emission band rather than shift it. The present paper also discusses the possible mechanisms for this suppression.

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e-pub ahead of print date: 2014
Venue - Dates: 5th International Workshop on Photoluminescence in Rare Earths (PRE'14): Photonic materials and devices, Spain, 2014-05-14 - 2014-05-16
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 365012
URI: http://eprints.soton.ac.uk/id/eprint/365012
PURE UUID: 32f7fe83-290a-4dd6-ae8f-d50db69f0d7d
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: 20 May 2014 11:06
Last modified: 10 Jul 2020 00:33

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