67 research outputs found
High refractive index in low metal content nanoplasmonic surfaces from self-assembled block copolymer thin films
Materials with a high and tunable refractive index are attractive for nanophotonic applications. In this contribution, we propose a straightforward fabrication technique of high-refractive index surfaces based on self-assembled nanostructured block copolymer thin films. The selective and customizable metal incorporation within out-of-plane polymer lamellae produces azimuthally isotropic metallic nanostructures of defined geometries, which were analysed using microscopy and small-angle X-ray scattering techniques. Variable-angle spectroscopic ellipsometry was used to relate the geometrical parameters of the metallic features and the resulting refractive index of the patterned surfaces. In particular, nanostructured gold patterns with a high degree of homogeneity and a gold content as low as 16 vol% reach a refractive index value of more than 3 in the visible domain. Our study thus demonstrates a new route for the preparation of high refractive index surfaces with a low metal content for optical applications
Elaboration et organisation de nano-objets à l'aide de copolymères diblocs
International audienc
Procédé de réalisation d’une grille flottante ayant une alternance de lignes en premier et second matériaux
Self-assembled block polymer templates as high resolution lithographic masks
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Phase behaviour in thin film of cylinder-forming diblock copolymer: deformation and division of heptacoordinated microdomains
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