EXCITON-POLARITONS IN CDTE CDMNTE MULTIPLE-QUANTUM-WELL STRUCTURES/

Exciton interaction with photons is studied in CdTe/CdMnTe multiple qu antum well structures differing by the spatial period. In the 10/10 nm structures, the non-zero lateral momentum of photons attained in the attenuated total reflection (ATR) affects the heavy-hole exciton line shifting it to lower energies relative to that observed in the normal transmission and even splitting it in the case of ATR of s-polarised l ight. The light-hole exciton line shift turns out to be opposite. Thes e effects do not appear in the 2/2 nm structures where the excitons in adjacent wells do couple without the photon mediation. (C) 1998 Elsev ier Science Ltd. All rights reserved.