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+ hυ=>S^±+P^μ and S^±+ hυ=>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^±+ hυ=> P^^μ + BP^±2 will occur, where BP^±2 expresses a charged bipolaron with two electronic units. For a bipolaron case, the processes BP^±2+ hυ=>P^±+ P^±and BP^±2+hυ=> BP^±2 +E⁰ are obtained.