Influence of TiO sub(2) host crystallinity on Er super(3+) light emission

This work presents a study of the luminescence properties of Er super(3+) when included into two different TiO sub(2) hosts: a polycrystalline and an amorphous host. The two host environments were produced by depositing two thin films with different Er super(3+) concentration using radio-frequency m...

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Bibliographic Details
Published in:Optical materials express 2016-05, Vol.6 (5), p.1664-1678
Main Authors: Johannsen, S R, Roesgaard, S, Julsgaard, B, Ferreira, R A S, Chevallier, J, Balling, P, Ram, S K, Larsen, A Nylandsted
Format: Article
Language:English
Subjects:
Anatase
Crystallinity
Light emission
Luminescence
Optical properties
Phases
Thin films
Titanium dioxide
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Summary:This work presents a study of the luminescence properties of Er super(3+) when included into two different TiO sub(2) hosts: a polycrystalline and an amorphous host. The two host environments were produced by depositing two thin films with different Er super(3+) concentration using radio-frequency magnetron sputtering. Structural analysis revealed the presence of the rutile and anatase phases in the polycrystalline film. Time-resolved and steady-state photoluminescence measurements evidenced the presence of two distinct local Er super(3+) environments in the polycrystalline host. For the amorphous TiO sub(2) host, only one Er super(3+) environment was observed, which differed from the two environments in the polycrystalline host. A method for extracting a fast and slow time-resolved emission spectrum from the two observed local environments in the polycrystalline host is also presented.
ISSN:2159-3930
2159-3930
DOI:10.1364/OME.6.001664