| Summary: | Exciton-polaritons are hybrid light-matter quasiparticles forming in semiconductor microcavities.
By combining the light effective mass of photons with the thermalizing behavior of
an electronic system, the particles are able to undergo a form of Bose-Einstein condensation
at considerably higher temperature than more traditional condensates of cold-atoms. In
addition, exciton-polaritons can be controlled by changing their potential energy landscape,
which may have both real and imaginary components (imaginary components corresponding
to non-uniform gain and loss). In the first part of the project, the spin-dependent splitting
of whispering gallery modes formed in mesa traps is studied and a theoretical model to explain
the phenomenon based on the optical spin Hall effect is presented. In the second part
of the project, we present a theoretical scheme for the realisation of unidirectional
transmission of
exciton-polariton signals in a spin-dependent micropillar chain and study the dynamics of such
a system.
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