23 Dec 2025 Tue 4 pm

One of the promising advantages of perovskites microcavities is the possibility to host exciton-polaritons at room temperatures. Due to the strong linear birefringence and TE- TM splitting which are possessed by these structures, the dispersion shows presence of two Dirac points (DPs). Because of that, the conical diffraction becomes asymmetric and the observed linear Optical Spin Hall effect (OSHE) manifests itself through the nontrivial patterns in intensity and Stokes vector components – stripes. However, it is possible, in especial, experimentally, to achieve condensation also at the energies slightly above the DPs, where the exact profile of the dispersion plays a crucial role leading to the strong redistribution of the intensity in the real space. In this talk we will discuss different regimes of polariton propagation as a result of the change of the beam frequency.  Experimental results are supported by numerical simulations of the spinor Gross-Pitaevskii equations.

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