  Integrated optical devices able to control light matter interactions on the
nanoscale have attracted the attention of the scientific community in recent
years. However, most of these devices are based on silicon waveguides, limiting
their use for telecommunication wavelengths. In this contribution, we propose
an integrated device that operates with light in the visible spectrum. The
proposed device is a hybrid structure consisting of a high-refractive-index
layer placed on top of an ion-exchanged glass waveguide. We demonstrate that
this hybrid structure serves as an efficient light coupler for the excitation
of nanoemitters. The numerical and experimental results show that the device
can enhance the electromagnetic field confinement up to 11 times, allowing a
higher photoluminescence signal from nanocrystals placed on its surface. The
designed device opens new perspectives in the generation of new optical devices
suitable for quantum information or for optical sensing.
