Highly localized accelerating beams using nano-scale metallic gratings
| Autor: | Carlos J. Zapata-Rodríguez, Mahin Naserpour, Abdolnaser Zakery, Juan Jose Miret |
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| Přispěvatelé: | Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía, Óptica y Ciencias de la Visión |
| Rok vydání: | 2015 |
| Předmět: |
Physics
Diffraction Curvilinear coordinates Wave propagation business.industry Physics::Optics Grating Invariant optical fields Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials symbols.namesake Optics Diffraction theory symbols Physics::Accelerator Physics Electrical and Electronic Engineering Physical and Theoretical Chemistry business Nanoscopic scale Intensity (heat transfer) Beam (structure) Bessel function Óptica |
| Zdroj: | Optics Communications. 334:79-84 |
| ISSN: | 0030-4018 2011-2912 |
| Popis: | Spatially accelerating beams are non-diffracting beams whose intensity is localized along curvilinear trajectories, also incomplete circular trajectories, before diffraction broadening governs their propagation. In this paper we report on numerical simulations showing the conversion of a high-numerical-aperture focused beam into a nonparaxial shape-preserving accelerating beam having a beam-width near the diffraction limit. Beam shaping is induced near the focal region by a diffractive optical element that consists of a non-planar subwavelength grating enabling a Bessel signature. This research was funded by the Spanish Ministry of Economy and Competitiveness under the project TEC2011-29120-C05-01. M. Naserpour acknowledges financial support from the Ministry of Science, Research and Technology of Iran. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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