J. Erland et al., NONLINEAR QUANTUM BEAT SPECTROSCOPY OF BOUND BIEXCITONS IN II-VI SEMICONDUCTORS, Journal of crystal growth, 138(1-4), 1994, pp. 800-804
With the technique of nonlinear quantum beat spectroscopy (NQBS), base
d on time-integrated, spectrally resolved four-wave mixing, the nonlin
earities of biexcitons localized at neutral acceptor sites in CdSe are
investigated. The NQBS offers the possibility to distinguish between
quantum beats from a three-level system and polarization interference
from independent two-level systems. The localized biexciton states are
discussed in analogy with excited states of holes in neutral donor co
mplexes.