  In this paper, we demonstrate the infrared photoluminescence emission from
Ge(Si) quantum dots enhanced with collective Mie modes of silicon nanopillars.
We show that the excitation of band edge dipolar modes of a linear nanopillar
array results in strong reshaping of the photoluminescence spectra. Among other
collective modes, the magnetic dipolar mode with the polarization along the
array axis contributes the most to the emission spectrum exhibiting an
experimentally measured Q-factor of around 500 for an array of 11 pillars. The
results belong to the first experimental evidence of light emission enhancement
of quantum emitters applying collective Mie resonances and therefore represent
an important contribution to the new field of active all-dielectric
meta-optics.
