The exciton polaritons dispersion law is analyzed in a one-dimensional multiple-quantum-well based photonic crystal. An effective approach allowing to consider structures with an arbitrary periodic spatial modulation of the dielectric function and the multilevel structure of the exciton spectrum is developed. It is shown that the condition of the Bragg resonance has to be modified to take into account the symmetry of the exciton states and the non-trivial dispersion law of the electromagnetic waves in photonic crystals. For a particular case of a one-level excitonic susceptibility it is shown that the Bragg resonance occurs when the exciton frequency falls to the high-frequency boundary of the photonic band-gap. The polariton's dispersion law is considered. The angular dependence of the spectrum is analyzed. The effect of multiple exciton levels on the polariton spectrum is discussed.

Date Published: 15 September 2005
PDF: 11 pages
Proc. SPIE 5924, Complex Mediums VI: Light and Complexity, 59240R (15 September 2005); doi: 10.1117/12.618541

Published in SPIE Proceedings Vol. 5924:
Complex Mediums VI: Light and Complexity
Martin W. McCall; Graeme Dewar; Mikhail A. Noginov, Editor(s)