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Etude des propriétés spectrales et spatiales de réflecteurs et coupleurs résonants

Romain Laberdesque 1 
1 LAAS-PHOTO - Équipe Photonique
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : The study is focused on the spectral and spatial properties of resonant grating structures. Resonant gratings in cavity are identified as structures allowing the fabrication of small-area and efficient reflectors and couplers. A model based on coupled mode theory has been developped, enabling fast modeling and design of this kind of structures. Thanks to this model we improved our understanding of the spectral and spatial properties of resonant gratings in cavity. In particular, we have established the relationship between the structure's geometry and the spectral and spatial properties of the modes which efficiently interact with the structures when used as reflectors or as couplers. The design of coupling structures with high-quality factor and controlled spatial profiles on cm-sized surfaces has been studied. Two axis of research are presented: structures composed of several cavities and structures composed by one large cavity. The later ones allow a better control of the spatial properties both in intensity and phase. We demonstrate that these structures have a high potential for holography. Design of such structures with low contrast index is also considered, particularly the design and fabrication of polymer-based waveguiding structures.
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Romain Laberdesque. Etude des propriétés spectrales et spatiales de réflecteurs et coupleurs résonants. Optique / photonique. INSA de Toulouse, 2016. Français. ⟨NNT : 2016ISAT0047⟩. ⟨tel-02003527⟩

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