Polariton condensation with localized excitons and propagating photons |
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Authors: | Keeling Jonathan Eastham P R Szymanska M H Littlewood P B |
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Institution: | Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, United Kingdom. |
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Abstract: | We estimate the condensation temperature for microcavity polaritons, allowing for their internal structure. We consider polaritons formed from localized excitons in a planar microcavity, using a generalized Dicke model. At low densities, we find a condensation temperature T(c) proportional, rho, as expected for a gas of structureless polaritons. However, as T(c) becomes of the order of the Rabi splitting, the structure of the polaritons becomes relevant, and the condensation temperature is that of a BCS-like mean-field theory. We also calculate the excitation spectrum, which is related to observable quantities such as the luminescence and absorption spectra. |
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