The wave packet motions in the self-trapped exciton (STE) and the electronic ground states were studied in Pt-I with an ultrafast time-resolved spectroscopy. The formation mechanism of the wave packet on the G state was explained by the ISRS mechanism. On the other hand, the beginning of the wave packet motion in the STE state was delayed by about 50 fs with respect to the photoexcitation. The delay time was attributed to the lattice relaxation process between the FE and STE states and the thermalization process in the FE band.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)