PLASMON-FRENKEL-EXCITON IN A CLUSTERED SOLID

The standard theory of the Frenkel exciton (a small radius exciton) is applied to a fullerene 2D solid. It is the dipole collective electron excitation of a single cluster which forms the delocalized plasmon-Fr enkel-exciton (PFE) in a crystal. The PFE retarded interaction is take n into account. We present transverse PFE-polariton dispersion curves along with the Coulomb problem solution for longitudinal excitation in the 2D plane. (C) 1998 Elsevier Science B.V.