Excited confined quantum states in CdMnTe-CdTe superlattices

Abstract

The piezomodulated reflectivity spectra of CdMnTe-CdTe superlattices grown by photoassisted molecular-beam epitaxy reveal signatures associated with excited confined quantum states. The energies of these signatures are in excellent agreement with the predicted energies for heavy-hole and light-hole states calculated using a Kronig–Penney model in which strain effects are included. For comparison, we present calculations for the cases of a zero valence-band offset and a small valence-band offset which scales with Mn concentration.