6533b860fe1ef96bd12c2fe0

RESEARCH PRODUCT

Highly localized accelerating beams using nano-scale metallic gratings

Carlos J. Zapata-rodríguezMahin NaserpourMahin NaserpourAbdolnaser ZakeryJuan Jose Miret

subject

PhysicsDiffractionCurvilinear coordinatesWave propagationWave propagationbusiness.industryPhysics::OpticsGratingInvariant optical fieldsAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materialssymbols.namesakeOpticsDiffraction theorysymbolsPhysics::Accelerator PhysicsElectrical and Electronic EngineeringPhysical and Theoretical ChemistrybusinessNanoscopic scaleIntensity (heat transfer)Beam (structure)Bessel functionÓptica

description

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.

yearjournalcountryeditionlanguage
2015-01-01Optics Communications
https://doi.org/10.1016/j.optcom.2014.08.024