The relaxation process of the excitonic states in polydiacetylene studied by time- and wavenumber-resolved femtosecond coherent anti-Stokes Raman scattering

Authors
Chen, T Vierheilig, A Waltner, P Kiefer, W Materny, A
Citation
T. Chen et al., The relaxation process of the excitonic states in polydiacetylene studied by time- and wavenumber-resolved femtosecond coherent anti-Stokes Raman scattering, CHEM P LETT, 325(1-3), 2000, pp. 176-182
Citations number
10
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
CHEMICAL PHYSICS LETTERS
ISSN journal
00092614 → ACNP
Volume
325
Issue
1-3
Year of publication
2000
Pages
176 - 182
Database
ISI
SICI code
0009-2614(20000721)325:1-3<176:TRPOTE>2.0.ZU;2-H
Abstract
We report the relaxation process of photoexcited polydiacetylene in its exc itonic states. A coherent polarization involving the B-1(u) excitonic state is generated and probed using the fs-CARS (Coherent anti-Stokes Raman scat tering) method by varying the delay time between the pump and Stokes laser pulses. We obtain the relaxation data from an analysis of the wavenumber-re solved anti-Stokes signal. The fast dephasing time in the excitonic states was measured and the geometry relaxation model of the polymer chain is disc ussed. (C) 2000 Published by Elsevier Science B.V.