H. Mariette et al., DYNAMICS OF EXCITORS TUNNELING IN II-VI ASYMMETRIC DOUBLE-QUANTUM WELLS, Nuovo cimento della Societa italiana di fisica. D, Condensed matter,atomic, molecular and chemical physics, biophysics, 17(11-12), 1995, pp. 1277-1284
Steady-state and picosecond photoluminescence experiments on CdTe/CdZn
Te and CdTe/CdMnTe asymmetric double quantum wells are presented. An e
xternal magnetic field is used to tune the coupling between the two QW
s by allowing resonances to occur between excitonic states. Very effic
ient tunnelling is found when an exciton from the high-energy QW can t
ransfer either with the emission of an LO phonon or via the resonance
with the 2s state of the low-energy QW.