Accelerating wide-angle converging waves in the near field

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Title: Accelerating wide-angle converging waves in the near field
Authors: Naserpour, Mahin | Zapata Rodríguez, Carlos Javier | Zakery, Abdolnaser | Díaz-Aviñó, Carlos | Miret, Juan Jose
Research Group/s: Óptica y Ciencias de la Visión
Center, Department or Service: Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía
Keywords: Invariant optical fields | Artificially engineered materials | Diffraction theory
Knowledge Area: Óptica
Issue Date: 2015
Publisher: IOP Publishing
Citation: Journal of Optics. 2015, 17(1): 015602 (10pp). doi:10.1088/2040-8978/17/1/015602
Abstract: We show that a wide-angle converging wave may be transformed into a shape-preserving accelerating beam having a beam-width near the diffraction limit. For that purpose, we followed a strategy that is particularly conceived for the acceleration of nonparaxial laser beams, in contrast to the well-known method by Siviloglou et al (2007 Phys. Rev. Lett. 99 213901). The concept of optical near-field shaping is applied to the design of non-flat ultra-narrow diffractive optical elements. The engineered curvilinear caustic can be set up by the beam emerging from a dynamic assembly of elementary gratings, the latter enabling to modify the effective refractive index of the metamaterial as it is arranged in controlled orientations. This light shaping process, besides being of theoretical interest, is expected to open up a wide range of broadband application possibilities.
Sponsor: 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.
ISSN: 2040-8978 (Print) | 2040-8986 (Online)
DOI: 10.1088/2040-8978/17/1/015602
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2015 IOP Publishing Ltd
Peer Review: si
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Appears in Collections:INV - IMAOS+V - Artículos de Revistas

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