Re-excited States in Conjugated Polymers

We investigate the re-exciting process of a soliton, a polaron and a bipolaron in conjugated polymers. For a soliton case, the processes S0+h?S?+P and S?+h?S0+P? will take place, where S0, S? and P? express a neutral soliton, charged solitons and charged polarons, respectively. For a polaron case, the processes P?+h?P+BP?2 will occur, where BP?2 expresses a charged bipolaron with two electronic units. For a bipolaron case, the processes BP?2+h?P?+P? and BP?2+h?BP?2+E0 are obtained.