Phonon Interaction of Excitonic Molecule in CuCl

抄録

The line shapes of the giant two-photon absorption band for the direct generation of excitonic molecules and the molecule luminescence in CuCl have been studied in a temperature region between 6 K and 100 K. The interaction between excitonic molecules and acoustical phonons is found to play an important role for the relaxation mechanism of excitonic molecules at high temperature. For temperatures higher than ∼50 K, the multi-phonon scattering process becomes predominant, and it causes the asymmetry in line shapes of the two-photon absorption band and the relevant two-photon resonant Raman lines.