Focused azimuthally polarized vector beam and spatial magnetic resolution below the diffraction limit

  title={Focused azimuthally polarized vector beam and spatial magnetic resolution below the diffraction limit},
  author={Mehdi Veysi and Caner Guclu and Filippo Capolino},
  journal={Journal of The Optical Society of America B-optical Physics},
An azimuthally electric-polarized vector beam (APB), with a polarization vortex, has a salient feature that it contains a magnetic-dominant region within which the electric field is ideally null while the longitudinal magnetic field is maximum. Fresnel diffraction theory and plane-wave spectral calculations are applied to quantify field features of such a beam upon focusing through a lens. The diffraction-limited full width at half-maximum (FWHM) of the beam’s longitudinal magnetic field… 

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Electromagnetic diffraction in optical systems, II. Structure of the image field in an aplanatic system

  • B. RichardsE. Wolf
  • Physics
    Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
  • 1959
An investigation is made of the structure of the electromagnetic field near the focus of an aplanatic system which images a point source. First the case of a linearly polarized incident field is