Phys. Rev. Lett. 90, 047402 (2003) [4 pages]Time Domain Investigation of the Intrachain Vibrational Dynamics of a Prototypical Light-Emitting Conjugated PolymerReceived 15 July 2002; published 31 January 2003 Coherent nuclear motion of the carbon backbone is monitored in real time in substituted poly(phenylene)-vinylene in both excited and ground electronic state using sub-10-fs light pulses. Characteristic features of the intrachain vibrational dynamics are obtained. We observe vibrational dephasing in the excited state within 1 ps (time constant T2e≈300 fs). These findings are in agreement with the molecular picture for photoexcitation in conjugated polymers. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.047402
DOI:
10.1103/PhysRevLett.90.047402
PACS:
78.47.+p, 78.30.Jw, 78.55.Kz
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