A joint analysis of spectroscopic data obtained at liquid–helium temperatures by three line-narrowing techniques, photon echo (PE), persistent hole burning (HB), and single molecule spectroscopy (SMS), is presented. Two polymer systems, polyisobutylene (PIB) and polymethylmethacrylate (PMMA), doped with tetra-tert-butylterrylene (TBT) were studied via PE and HB techniques and the results are compared with literature data [R. Kettner et al., J. Phys. Chem. 98, 6671 (1994); B. Kozankiewicz et al., J. Chem. Phys. 101, 9377 (1994)] obtained by SMS. Both systems behave quite differently. In TBT/PIB a rather strong influence of a dispersion of the dephasing time was found which plays only a minor role in TBT/PMMA. We have also measured the temperature dependence of for both systems in a broad temperature range (0.4–22 K). Using these data we separated the two different contributions to the optical dephasing — due to an interaction with two-level systems and due to coupling with local low-frequency modes. The data are compared with calculations using a numerical and a semianalytical model in the presence of a large dispersion of the single molecule parameters. Furthermore, we discuss the differences of the linewidths as measured by different experimental methods.
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22 October 1998
Research Article|
October 22 1998
Comparison of photon echo, hole burning, and single molecule spectroscopy data on low-temperature dynamics of organic amorphous solids
S. J. Zilker;
S. J. Zilker
Physikalisches Institut and BIMF, University of Bayreuth, D-95440 Bayreuth, Germany
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L. Kador;
L. Kador
Physikalisches Institut and BIMF, University of Bayreuth, D-95440 Bayreuth, Germany
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J. Friebel;
J. Friebel
Physikalisches Institut and BIMF, University of Bayreuth, D-95440 Bayreuth, Germany
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Yu. G. Vainer;
Yu. G. Vainer
Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow Region, 142092, Russian Federation
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M. A. Kol’chenko;
M. A. Kol’chenko
Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow Region, 142092, Russian Federation
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R. I. Personov
R. I. Personov
Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow Region, 142092, Russian Federation
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J. Chem. Phys. 109, 6780–6790 (1998)
Article history
Received:
June 01 1998
Accepted:
July 21 1998
Citation
S. J. Zilker, L. Kador, J. Friebel, Yu. G. Vainer, M. A. Kol’chenko, R. I. Personov; Comparison of photon echo, hole burning, and single molecule spectroscopy data on low-temperature dynamics of organic amorphous solids. J. Chem. Phys. 22 October 1998; 109 (16): 6780–6790. https://doi.org/10.1063/1.477324
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