| Issue |
Europhys. Lett.
Volume 44, Number 1, October I 1998
|
|
|---|---|---|
| Page(s) | 68 - 73 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1998-00436-6 | |
| Published online | 01 September 2002 | |
Anomalous spectral diffusion in polymer glasses
1
Institute of Spectroscopy - RAS, 142092, Troitsk, Moscow region, Russia
2
University of Bayreuth and BIMF - D-95440 Bayreuth, Germany
Received:
12
December
1998
Accepted:
27
July
1998
Spectral diffusion (SD) in PMMA samples, doped with Zn-tetrabenzoporphyne,
was investigated via populational hole burning in the absorption spectrum of a
chromophore on a time scale 
–150 ms and in a temperature interval
of 1.7–10 K. An anomalous increase of the SD rate was found in the
millisecond range, which cannot be attributed to peculiarities in the
relaxation rate distribution of the two-level systems in PMMA. The apparent
correlation of the anomalous SD region with the time domain of chromophore
triplet state deactivation cannot be explained in the framework of existing
SD models.
PACS: 71.20.Rv – Polymers and organic compounds / 61.43.Fs – Glasses / 63.20.Mt – Phonon-defect interactions
© EDP Sciences, 1998
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