Optical dephasing and electron-phonon interaction in β-carotene solutions

doi:10.1016/S0022-2313(97)00258-5

Journal of Luminescence

Volumes 76–77, February 1998, Pages 604-607

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Abstract

Fluorescence spectra of β-carotene in ethanol measured in a temperature range from liquid to solid phases of solvent are compared with a model calculation, assuming a linear electron-phonon interaction with a phonon density of states weighted by coupling constant, $ϱ(ω) ∝ ωe^{−ωω_{p}}$ . We obtain a peak phonon energy ω_p = 28 cm⁻¹, a lattice relaxation energy E_LR = 210 cm⁻¹ and temperature dependences of amplitude of the energy modulation and inhomogeneous width. The ratio $E_{LR} ω_{P} ∼- 8$ shows that the electron -phonon interaction is near the strong coupling regime in this system.

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Journal of Luminescence

Optical dephasing and electron-phonon interaction in β-carotene solutions

Abstract

Phys. Rev. Lett.

Phys. Rev. Lett.

J. Chem. Phys.

J. Chem. Phys.

J. Chem. Phys.