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Ultrafast dynamics of three novel oligomers with strong two-photon absorption properties

  • Y. Yan
  • , B. Li
  • , K. Liu
  • , Z. Dong
  • , S. Qian*
  • , W. Li
  • , X. Wang
  • *Corresponding author for this work
  • Fudan University
  • Soochow University

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Pages (from-to)249-254
Number of pages6
JournalApplied Physics B: Lasers and Optics
Volume88
Issue number2
DOIs
StatePublished - Jul 2007
Externally publishedYes

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