Abstract
A comparative study of the nonlinear optical properties and ultrafast dynamics of three oligomers were carried out using femtosecond laser spectroscopic techniques. All oligomers showed intense fluorescence emission induced by a two-photon absorption process. Relaxation features with parallel and perpendicular polarization configurations were investigated in a one-color pump-probe experiment at 400 nm. Two relaxation components were assigned to the exciton migration and exciton recombination processes, respectively. Time-resolved fluorescence results showed that the electron-phonon interaction happens on the picosecond-scale, while the recombination lifetimes of the excited state are relatively long.
| Original language | English |
|---|---|
| Pages (from-to) | 249-254 |
| Number of pages | 6 |
| Journal | Applied Physics B: Lasers and Optics |
| Volume | 88 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jul 2007 |
| Externally published | Yes |