Polarization Manipulation of Polariton Condensates in Organic Microcavities

Abstract The polarization or spin manipulation of photons attracts significant attention in modern photonics. However, the severe dispersion of photons in planar microcavities inevitably leads to difficulties in achieving wavelength‐dependent photonic spin operation. In this study, pseudo‐spin manipulation of polariton condensates in an organic crystal‐filled microcavity is achieved, confirmed by the corresponding emitted polarized light. By adjusting the incident wavevector of the off‐resonant pumping laser, the energies and polarizations of polariton condensates can be continuously manipulated. Surprisingly, the individual left‐handed or right‐handed circularly polarized condensates can be selectively emerged at the specific wavevectors of the incident laser along a specific direction of the organic crystal. This spin manipulation of polariton condensates holds significant implications in optoelectronics, particularly in the exploration of topological photonics and chiral optics in the strong light‐matter coupling regime.