Title:
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Super-collimation by axisymmetric photonic crystals
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Author:
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Purlys, Vytautas; Maigyte, Lina; Gailevicius, Darius; Peckus, Martynas; Gadonas, Roaldas; Staliunas, Kestutis
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear; Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers |
Abstract:
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We propose and experimentally show the mechanism of beam super-collimation by axisymmetric photonic crystals, specifically by periodic (in propagation direction) structure of layers of concentric rings. The physical mechanism behind the effect is an inverse scattering cascade of diffracted wave components back into on-and near-axis angular field components, resulting in substantial enhancement of intensity of these components. We explore the super-collimation by numerical calculations and prove it experimentally. We demonstrate experimentally the axial field enhancement up to 7 times in terms of field intensity. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Ciències de la visió::Òptica física::Llum -Àrees temàtiques de la UPC::Física -Photonics -Negative refraction -Lens -Fotònica -Llum |
Rights:
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Document type:
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Article - Published version Article |
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