6533b825fe1ef96bd1283131

RESEARCH PRODUCT

Generation of accelerating beams using nano-scale metallic circular gratings

Abdolnaser ZakeryCarlos J. Zapata-rodríguezJuan Jose MiretMahin Naserpour

subject

PhysicsDiffractionbusiness.industryPhysics::OpticsGratingDiffraction efficiencysymbols.namesakeOpticsMaxwell's equationsLimit (music)symbolsPhysics::Accelerator PhysicsbusinessNanoscopic scaleBeam (structure)Bessel function

description

Spatially accelerating beams that are solutions to the Maxwell equations may propagate along incomplete circular trajectories, after which diffraction broadening takes over and the beams spread out. In this paper we report on numerical simulations that show 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 by a diffractive optical element that consists of a non-planar sub-wavelength grating enabling a Bessel signature.

yearjournalcountryeditionlanguage
2014-07-012014 16th International Conference on Transparent Optical Networks (ICTON)
https://doi.org/10.1109/icton.2014.6876688