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Optical line shapes of one-dimensional excitions: influence of a heat bath with coloured noise

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Zeitschrift für Physik B Condensed Matter

Abstract

Optical absorption line shapes for Frenkel excitons moving on a linear chain are calculated. The model takes into account coherent nearest neighbour interaction and the influence of the phonons by a random modulation of the local excitation energies. The energy modulations are described by a stochastic process with coloured noise and exponentially decaying correlation functions. With increasing rate of the energy fluctuations the model describes a transition from static to dynamic disorder. The calculated optical absorption lines are asymmetric for slowly fluctuating energies and become symmetric and Lorentzian in shape for fast energy modulations.

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Author notes

  1. B. Kaiser

    Present address: Abteilung Biophysik, Universität Ulm, Albert-Einstein-Allee 11, D-7900, Ulm, FRG

Authors and Affiliations

  1. Abteilung Theoretische Physik, Universität Ulm, Albert-Einstein-Allee 11, D-7900, Ulm, Federal Republic of Germany

    A. M. Jayannavar & P. Reineker

Authors
  1. A. M. Jayannavar
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  2. B. Kaiser
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  3. P. Reineker
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Additional information

Dedicated to Prof. H.C. Wolf on the occasion of his 60th birthday

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Jayannavar, A.M., Kaiser, B. & Reineker, P. Optical line shapes of one-dimensional excitions: influence of a heat bath with coloured noise. Z. Physik B - Condensed Matter 77, 229–241 (1989). https://doi.org/10.1007/BF01313667

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  • DOI: https://doi.org/10.1007/BF01313667

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