Figure 1: Theoretical field intensity distributions and relative phases of a tightly focused radially polarized beam. | Nature Communications

Figure 1: Theoretical field intensity distributions and relative phases of a tightly focused radially polarized beam.

From: Polarization-controlled directional scattering for nanoscopic position sensing

Figure 1

The wavelength λ=652 nm and experimental parameters are taken into account (see Methods section). (a) The transverse (radial) electric field intensity , (b) the longitudinal electric field intensity and (c) the transverse (azimuthal) magnetic field are all normalized to the maximum value of the total field intensity, (Gaussian units). The corresponding phase distributions , and are plotted as insets. (d) Cross-sections of the focal fields along the x axis. Close to the centre (grey area in the lower image), the transverse field amplitudes Re[Ex] and Re[Hy] are linearly dependent on the position, while the longitudinal field Im[Ez] is approximately constant.

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