Field-Induced Dissociation

The interpretation of our CPG data is complicated by the presence of comparatively fast radiative and nonradiative decay channels for the singlet exciton, which compete with the field-induced dissociation. In order to provide a clear picture of the observed mechanism and disentangle it from the singlet exciton decay dynamics, we define the following phenomenological time-dependent parameter ... 

R. Kersting, et al., Ultrafast field-induced dissociation of excitons in conjugated polymers, Phys. Rev. Lett. 73 (1994) 1440-1443 ... 

Kersting R, Lemmer U, Deussen M, Bakker HJ, Mahrt RF, Kurz H, Arkhipov VI, Bassler H, Gobel EO (1994) Ultrafast Field-Induced Dissociation of Excitons in Conjugated Polymers. Phys Rev Lett 73(10) 1440—1443... 

F. Chateauneuf, T.T. Nguyen-Dang, N. OueUet, O. Atabek, Dynamical quenching of field-induced dissociation ofHf in intense infrared lasers, J. Chem. Phys. 108 (1998) 3974. 

When electric fields are applied, processes competitive with the radiative decay of the excitons, such as their field-induced dissociation, usually occur. The On-sager theory is often used to describe the field-dependent decay of the PL intensity (/pl) due to charge separation ... 

The combination of fast ion-beam photofragmentation with field-dissociation spectroscopy opens interesting new possibilities for studying long-range ion-atom interactions. This has been demonstrated by Bjerre and Keiding [9.73] who measured the 0 -0 potential in the range 10-20 A from electric-field-induced dissociation of selectively laser-excited O ions in a fast beam. 

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