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

@article{Veysi2016FocusedAP,
  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},
  year={2016},
  volume={33},
  pages={2265-2277}
}
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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