Barton, T. J.

Benner, R. E.

Ehrenfreund, E.

Ozaki, M.

Vardeny, Z. V.

Yoshino, K.

English

Resonant Raman scattering dispersion of the most strongly coupled phonon frequencies with the excitation laser photon energy is measured in terms of a dispersion rate parameter D and quantified in a variety of p conjugated polymer films. D was found to be large in nonluminescent polymers and small in luminescent polymers. We show that D is determined by the dependence of the even parity excitons (Ag) on the polymer conjugation length, and this may serve as a useful spectroscopy for the 2Ag exciton in nonluminescent polymers where it is otherwise optically inactive

Osaka University Knowledge Archive

Dispersion of resonant raman scattering in π-conjugated polymers: Role of the even parity excitons

https://ir.library.osaka-u.ac.jp/repo/ouka/all/75864/PhysRevLett_79_09_1762.pdf

Dispersion of resonant raman scattering in π-conjugated polymers: Role of the even parity excitons

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