EXCITONIC FARADAY-ROTATION IN CDTE-CD1-XMNXTE QUANTUM-WELLS

We present a detailed analysis of the giant excitonic Faraday rotation in CdTe/CdMnTe quantum wells when the laser frequency is tuned across the excitonic resonance. This excitonic Faraday rotation effect is ve ry well accounted for by modeling the excitonic transition with a two- level system. The value found for the excitonic Verdet constant, 7 x 1 0(6) degrees/T/cm, is about two orders of magnitude larger than that m easured for interband transitions in the bulk or superlattices of semi magnetic semiconductors, making this effect attractive to study magnet o-optical properties of single quantum wells.