  We investigate an all-optical microscale planar lensing technique based on
coherent fluids of semiconductor cavity exciton-polariton condensates. Our
theoretical analysis underpins the potential in using state-of-the-art spatial
light modulation of nonresonant excitation beams to guide and focus polariton
condensates away from their pumping region. The nonresonant excitation profile
generates an excitonic reservoir that blueshifts the polariton mode and
provides gain, which can be spatially tailored into lens shapes at the
microscale to refract condensate waves. We propose several different avenues in
controlling the condensate fluid, and demonstrate formation of highly enhanced
and localised condensates away from the pumped reservoirs. This opens new
perspectives in guiding quantum fluids of light and generating polariton
condensates that are shielded from detrimental reservoir dephasing effects.
