Fast Dephasing in Glasses Induced by Tunneling States and Local Modes

Fast Dephasing in Glasses Induced by Tunneling States and Local Modes

We present a comprehensive investigation of fast line broadening processes in two amorphous polymers, polymethylmethacrylate and polyisobutylene. Using a combination of two-pulse and incoherent photon echo spectroscopy, we have studied the homogeneous linewidth of embedded impurity molecules in a wi...

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Veröffentlicht in:Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals Molecular crystals and liquid crystals, 1998-05, Vol.314 (1), p.143-148
Hauptverfasser: Zilker, Stephan J., Haarer, Dietrich, Vainer, Yuri G., Deev, Andrei V., Kol'chenkq, Michail A., Personov, Roman I.
Format: Artikel
Sprache:eng
Schlagworte:
amorphous solids
optical dephasing
photon echo
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Zusammenfassung:We present a comprehensive investigation of fast line broadening processes in two amorphous polymers, polymethylmethacrylate and polyisobutylene. Using a combination of two-pulse and incoherent photon echo spectroscopy, we have studied the homogeneous linewidth of embedded impurity molecules in a wide temperature range, namely 0.4-22 K. Thus, we are able to separate clearly between the two active dephasing mechanisms, two-level systems and low-frequency modes.
ISSN:1058-725X
DOI:10.1080/10587259808042470