  Rare-earth ion doped crystals for hybrid quantum technologies is an area of
growing interest in the solid-state physics community. We have earlier
theoretically proposed a hybrid scheme of a mechanical resonator which is
fabricated out of a rare-earth doped mono-crystalline structure. The rare-earth
ion dopants have absorption energies which are sensitive to crystal strain, and
it is thus possible to couple the ions to the bending motion of the crystal
cantilever. Here, we present the design and fabrication method based on
focused-ion-beam etching techniques which we have successfully employed in
order to create such microscale resonators, as well as the design of the
environment which will allow to study the quantum behavior of the resonators.
