Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10316/4268
Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Oliveira, J. C. | - |
dc.contributor.author | Cavaleiro, A. | - |
dc.contributor.author | Vieira, M. T. | - |
dc.contributor.author | Bigot, L. | - |
dc.contributor.author | Garapon, C. | - |
dc.contributor.author | Jacquier, B. | - |
dc.contributor.author | Mugnier, J. | - |
dc.date.accessioned | 2008-09-01T10:44:58Z | - |
dc.date.available | 2008-09-01T10:44:58Z | - |
dc.date.issued | 2003 | en_US |
dc.identifier.citation | Optical Materials. 24:1-2 (2003) 321-325 | en_US |
dc.identifier.uri | https://hdl.handle.net/10316/4268 | - |
dc.description.abstract | In the aim of better understand the influence of oxygen on the luminescent properties of Er:AlN films, two samples synthesized by radiofrequency reactive magnetron sputtering, have been analysed by site-selective spectroscopy around 1.55 [mu]m and compared to a reference aluminosilicate sample. The erbium content in the films was estimated to 3.3 at.% and oxygen content ranges from 6.2 at.% to 58.6 at.% (determination by EPMA). Line narrowing study was performed for values 6.2 at.% and 22.5 at.%. Both films were annealed at 1075 K for 1 h. Site-selective spectroscopy was carried out using a Ti:sapphire laser light with typical linewidth of 2 GHz tuned around 980 nm as the excitation source. The samples were cooled down to 1.5 K in a liquid-helium bath cryostat and their 4I13/2<-->4I15/2 luminescence was detected using a high-sensitivity germanium-cooled detector. It appears that the site distribution of the Er:AlN samples is not continuous as in classical aluminosilicate glass but presents a rupture that suggests the existence of two kinds of sites for erbium: oxygen site and nitrogen site. These observations can easily be interpreted within the framework of the nephelauxetic effect that explains a shift of the site distribution to the longer wavelengths with an increase of boundings bonding covalency. | en_US |
dc.description.uri | http://www.sciencedirect.com/science/article/B6TXP-48FCJGJ-C/1/f53f4c28f70e897b4b96058df7e50da1 | en_US |
dc.format.mimetype | aplication/PDF | en |
dc.language.iso | eng | eng |
dc.rights | openAccess | eng |
dc.subject | Photoluminescence | en_US |
dc.title | Oxygen sensitivity of erbium-doped AlN films probed by site selective spectroscopy | en_US |
dc.type | article | en_US |
dc.identifier.doi | 10.1016/S0925-3467(03)00143-5 | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.grantfulltext | open | - |
item.openairetype | article | - |
item.languageiso639-1 | en | - |
item.fulltext | Com Texto completo | - |
item.cerifentitytype | Publications | - |
crisitem.author.researchunit | CEMMPRE - Centre for Mechanical Engineering, Materials and Processes | - |
crisitem.author.researchunit | CEMMPRE - Centre for Mechanical Engineering, Materials and Processes | - |
crisitem.author.orcid | 0000-0002-6218-3098 | - |
crisitem.author.orcid | 0000-0001-8251-5099 | - |
Aparece nas coleções: | FCTUC Eng.Mecânica - Artigos em Revistas Internacionais |
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filee166a52be3834e148ff63ca9e6cd5b4a.pdf | 223.07 kB | Adobe PDF | Ver/Abrir |
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