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Issue 9, 2012
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Thermodynamics of exciton/polaritons in one and two dimensional organic single-crystal microcavities

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Abstract

We consider here the thermodynamics and phase-diagram of exciton/polaritons formed in low-dimensional organic single-crystal microcavities. Using the Dicke model for a lattice of Frenkel excitons coupled to a common cavity mode, we explore the transition between normal and condensate regimes as depending upon the exciton band-width and temperature of the polariton gas. We show that for one-dimensional conjugated polymers, the coexistence curve at low temperatures shifts towards lower critical coupling strengths as the exciton band-width is increased. We also consider the effect of orientational disorder in a two-dimensional polyacene slab on the formation of the polariton BEC. Our results indicate that while a small degree of orientational disorder will not have a profound effect on the critical exciton/photon coupling strength needed to produce the transition from normal to BEC regimes, BEC will likely be suppressed in glassy or strongly disordered molecular films.

Graphical abstract: Thermodynamics of exciton/polaritons in one and two dimensional organic single-crystal microcavities

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Publication details

The article was received on 25 Oct 2011, accepted on 09 Jan 2012 and first published on 11 Jan 2012


Article type: Paper
DOI: 10.1039/C2CP23204A
Citation: Phys. Chem. Chem. Phys., 2012,14, 3226-3233
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    Thermodynamics of exciton/polaritons in one and two dimensional organic single-crystal microcavities

    E. R. Bittner, S. Zaster and C. Silva, Phys. Chem. Chem. Phys., 2012, 14, 3226
    DOI: 10.1039/C2CP23204A

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