  Dielectric photonics platform provides unique possibilities to control light
scattering via utilizing high-index dielectric nanoantennas with peculiar
optical signatures. Despite the intensively growing field of all-dielectric
nanophotonics, it is still unclear how surrounding media affect scattering
properties of a nanoantenna with complex multipole response. Here we report on
light scattering by a silicon cubic nanoparticles embedded in lossless media,
supporting optical resonant response. We show that significant changes in the
scattering process are governed by the electro-magnetic multipole resonances
which experience spectral red-shift and broadening over the whole visible and
near-infrared spectra as the indices of media increase. Most interestingly that
the considered nanoantenna exhibits the broadband forward scattering in the
visible and near-infrared spectral ranges due to the Kerker-effect in
high-index media. The revealed effect of broadband forward scattering is
essential for highly demanding applications in which the influence of the media
is crucial such as health-care: sensing, treatment efficiency monitoring, and
diagnostics. In addition, the insights from this study are expected to pave the
way towards engineering the nanophotonic systems including but not limited to
Huygens-metasurfaces in media within a single framework.
