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Etude des caractéristiques d'un faisceau contrôlé en polarisation après transmission à travers différentes nanostructures

Abstract : In this work, we studied the interaction between light with well-defined polarization and two subwavelength structures milled through an opaque metallic film by using the « Mueller matrix » method. In a first part, we showed that a subwavelength annular concentric slit array, milled completely through the film, allows the filtering and conversion of the incident polarization,generating a radial polarization after transmission. We also showed that it was possible to generate non-diffracting J0 or J2 Bessel beams through such structures and to control their helicity by changing the circular polarization either in preparation or in analysis. In a second part, we showed the creation of a plasmonic bull’s eye structure having the same properties as a quarter wave-plate, by acting on the ellipticities of the rings - to generate a plasmonic phase - and of the central hole - to compensate the strong dichroïsm induced by the differential surface plasmon absorption.
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Submitted on : Wednesday, September 18, 2013 - 3:52:14 PM
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Emmanuel Lombard. Etude des caractéristiques d'un faisceau contrôlé en polarisation après transmission à travers différentes nanostructures. Micro et nanotechnologies/Microélectronique. Université de Strasbourg, 2012. Français. ⟨NNT : 2012STRAF065⟩. ⟨tel-00863310⟩

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