  High refractive index dielectric spheres present remarkable light-scattering
properties in the spectral range dominated by dipolar modes. However, most of
these properties are absent for larger spheres under plane wave illumination.
Here, we propose to unravel dipolar regimes regardless of the sphere size and
refractive index by illuminating with a pure dipolar field. This type of
illumination ensures that the scattering response of the sphere is purely
dipolar. In this scenario, we show that Kerker conditions are not only related
to duality symmetry and a strong backward-to-forward asymmetric
light-scattering, but also to the appearance of non-radiating sources: the
so-called hybrid anapoles. Finally, we show that all the abovementioned
scattering features under dipolar illumination are reproducible with an
experimentally accessible tightly-focused Gaussian beam.

Optics