Optical dynamics in crystal slabs: Crossover from superradiant excitons to bulk polaritons
- 3 February 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 68 (5) , 654-657
- https://doi.org/10.1103/physrevlett.68.654
Abstract
The radiative-excited-state dynamics in crystals slabs is studied as a function of the slab thickness L. A general dispersion relation is derived that interpolates between the superradiant-exciton regime at thicknesses small compared to an optical wavelength λ and bulk polaritons and thick crystals. It is shown that previous results predicting superradiance in thick slabs (L≫λ) arise from invalid pole approximations.Keywords
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