Optical and structural properties of SiO[sub]2[/sub] co-doped with Si-nc and Er[sup]3+[/sup] ions

Sébastien Cueff; Christophe Labbé; Benjamin Dierre; Julien Cardin; Larysa Khomenkova; Filippo Fabbri; Takashi Sekiguchi; Richard Rizk

doi:10.1117/12.865488

23 August 2010 Optical and structural properties of SiO₂ co-doped with Si-nc and Er³⁺ ions

Sébastien Cueff, Christophe Labbé, Benjamin Dierre, Julien Cardin, Larysa Khomenkova, Filippo Fabbri, Takashi Sekiguchi, Richard Rizk

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Proceedings Volume 7766, Nanostructured Thin Films III; 77660Z (2010) https://doi.org/10.1117/12.865488
Event: SPIE NanoScience + Engineering, 2010, San Diego, California, United States

Abstract

We present a study on erbium-doped silicon rich silicon oxide (SRSO:Er) thin films grown by the magnetron cosputtering of a three confocal cathodes according to the deposition temperature and the annealing treatment. It is shown that several parameters such as the stoichiometry SiOx, the Erbium content and the fraction of agglomerated Silicon are strongly influenced by the deposition temperature. Especially, an increase of the fraction of agglomerated-Si concomitant to a reduction of the erbium content is observed when the deposition temperature is raised. These structural differences have some repercussions on the optical properties that lead to better performances for high-temperature deposited material. It is illustrated by the Er-PL efficiency that is higher for 500°C-deposited than for RT-deposited sample at all annealing temperatures. Finally an investigation of the different emitting centres within the films is performed with a cathodoluminescence technique to highlight the emission of optically-active defect centers in the matrix. It is shown that some oxygen vacancies, namely Silicon-Oxygen Deficient Centers, have a strong contribution around 450-500 nm and are suspected to contribute to the energy transfer towards Er3+ ions.

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Sébastien Cueff, Christophe Labbé, Benjamin Dierre, Julien Cardin, Larysa Khomenkova, Filippo Fabbri, Takashi Sekiguchi, and Richard Rizk "Optical and structural properties of SiO₂ co-doped with Si-nc and Er³⁺ ions", Proc. SPIE 7766, Nanostructured Thin Films III, 77660Z (23 August 2010); https://doi.org/10.1117/12.865488

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KEYWORDS

Silicon

Erbium

Annealing

Ions

Silica

Silicon films

FT-IR spectroscopy

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