Papers › Modelling lattices of organic polaritons
Modelling lattices of organic polaritons
Thomas Jebb Sturges, Magdalena Stobińska
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Microcavity-polaritons in two-dimensional lattice geometries have been used to study a wide range of interesting physics. Meanwhile, organic materials have shown great promise on the road towards polaritonic devices, as the strong binding energy of their Frenkel excitons permits room temperature condensation and lasing. Whilst there are theoretical treatments of the condensation processes in planar organic microcavities, models of lattice geometries are lacking. Here, we introduce a model for describing the dynamics of lattices of zero-dimensional organic microcavities, where the dominant condensation mechanism involves the emission of a vibrational phonon. The vibronic resonance provides a tool for targeted condensation in a particular eigenmode of the system, which we highlight by examining a dimer and a dimerised chain. For the dimer, we observe a double resonance in the condensation efficiency that arises from tuning the condensate-reservoir detuning in to resonance with either the symmetric or antisymmetric mode. This selective condensation was also exploited in the dimerised chain, to condense the system into the topological edge states under homogeneous pumping of all cavities. We also showed an interesting signature of nonreciprocal transport when pumping a single cavity in the chain, where the direction of propagation depends on the sublattice being pumped.
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