Abstract
The valence band of CdSe is split into an A (upper) and B (lower) band; thus the B- exciton ground state is degenerate with the continuum of the A excitons. The splitting of 25 MeV corresponds almost exactly to the LO phonon energy of 26 meV. Therefore, not only slow transitions from B to A with acoustical phonons, but also fast transitions with optical phonons, are possible.
© 1990 Optical Society of America
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