Yann Gueguen
Centre national de la recherche scientifique
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Featured researches published by Yann Gueguen.
Proceedings of SPIE | 2017
Tomáš Halenkovič; Petr Němec; J. Gutwirth; Emeline Baudet; Marion Specht; Yann Gueguen; Jean-Christophe Sangleboeuf; Virginie Nazabal
The unique properties of amorphous chalcogenides such as wide transparency in the infrared region, low phonon energy, photosensitivity and high linear and nonlinear refractive index, make them prospective materials for photonics devices. The important question is whether the chalcogenides are stable enough or how the photosensitivity could be exacerbated for demanded applications. Of this view, the Ge-Sb-Se system is undoubtedly an interesting glassy system given the antinomic behavior of germanium and antimony with respect to photosensitivity. The amorphous Ge-Sb-Se thin films were fabricated by a rf-magnetron co-sputtering technique employing the following cathodes: GeSe2, Sb2Se3 and Ge28Sb12Se60. Radio-frequency sputtering is widely used for film fabrication due to its relative simplicity, easy control, and often stoichiometric material transfer from target to substrate. The advantage of this technique is the ability to explore a wide range of chalcogenide film composition by means of adjusting the contribution of each target. This makes the technique considerably effective for the exploration of properties mentioned above. In the present work, the influence of the composition determined by energy-dispersive X-ray spectroscopy on the optical properties was studied. Optical bandgap energy Egopt was determined using variable angle spectroscopic ellipsometry. The morphology and topography of the selenide sputtered films was studied by scanning electron microscopy and atomic force microscopy. The films structure was determined using Raman scattering spectroscopy.
Journal of Non-crystalline Solids | 2013
Guang Yang; Yann Gueguen; Jean Christophe Sangleboeuf; Tanguy Rouxel; Catherine Boussard-Plédel; Johann Troles; Pierre Lucas; Bruno Bureau
Journal of Non-crystalline Solids | 2016
Martin Wilding; Gaëlle Delaizir; Chris J. Benmore; Yann Gueguen; Morgane Dolhen; Jean-René Duclère; Sébastien Chenu; Sohei Sukenaga; Paul F. McMillan
Journal of Non-crystalline Solids | 2016
P. Mezeix; Fabrice Célarié; Patrick Houizot; Yann Gueguen; F. Muñoz; Tanguy Rouxel
International Journal of Applied Glass Science | 2018
Yann Gueguen; Asma Dergal; Khadidja Rahmoun; Vincent Keryvin; Bruno Bureau; Pierre Lucas; Jean-Christophe Sangleboeuf
Flow and Fracture of Advanced Glasses 7 | 2017
Yann Gueguen; Fabrice Célarié; Jean Rocherullé
Flow and Fracture of Advanced Glasses 7 | 2017
Marion Specht; Yann Gueguen; Virginie Nazabal; Florence Razan; Jean-Christophe Sangleboeuf
Flow and Fracture of Advanced Glasses 7 | 2017
Marion Dubernet; Yann Gueguen; Patrick Houizot; Emilie Bruyer; Xavier Rocquefelte
GOMD Glass and Optical Material Division Meeting | 2016
Yann Gueguen; Marion Dubernet; Fabrice Célarié; Patrick Houizot; Jean-Christophe Sangleboeuf; Tanguy Rouxel
DGG - ACerS Glass and Optical Materials Division (GOMD) Annual Meeting | 2014
Yann Gueguen; Vincent Keryvin; Jean-Christophe Sangleboeuf; Tanguy Rouxel; Pierre Lucas; Ellyn A. King; Bruno Bureau