Polariton condensation with saturable molecules dressed by vibrational modes
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Polaritons, mixed light-matter quasiparticles, undergo a transition to a condensed, macroscopically coherent state at low temperatures or high densities. Recent experiments show that coupling light to organic molecules inside a microcavity allows condensation at room temperature. The molecules act as saturable absorbers with transitions dressed by molecular vibrational modes. Motivated by this, we calculate the phase diagram and spectrum of a modified Tavis-Cummings model, describing vibrationally dressed two-level systems, coupled to a cavity mode. Coupling to vibrational modes can induce re-entrance, i.e. a normal-condensed-normal sequence with decreasing temperature and can drive the transition first-order.
Cwik , J , Reja , S , Littlewood , P B & Keeling , J 2014 , ' Polariton condensation with saturable molecules dressed by vibrational modes ' , EPL , vol. 105 , no. 4 , 47009 . https://doi.org/10.1209/0295-5075/105/47009
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