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Proceedings Paper

Theoretical studies of coherent phonon generation in dense media
Author(s): Sheng Hsien Lin; Railing Chang; Kuo Kan Liang; Jui-Hung Hsu; Jenwei Yu; Michitoshi Hayashi; Wunshain S. Fann
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Paper Abstract

The theory of pump-probe femto-second time-resolved experiment will be presented. For the case in which the pump and probe pulses do not overlap, the either can be referred to as the generalized linear response theory. The fs time-resolved spectra consist of the contributions from the dynamics of both population and coherence (or phase) of the nonstationary system. Unless the dephasing is fast, the quantum beat is often observed in fs time-resolved spectra. Recently, it has been found that some polymers could exhibit semiconducting properties. In particular, the conjugated polymers, poly (phenylene-vinylene), i.e., PPV, show strong photoluminescence and can form electroluminescent layer in light-emitting diodes (LED). To study the mechanisms of the photoluminescence of PPV, fs time-resolved experiments have been performed. In this paper, the theoretical analysis of these fs time-resolved spectra will be presented. 15

Paper Details

Date Published: 23 April 1998
PDF: 10 pages
Proc. SPIE 3277, Ultrafast Phenomena in Semiconductors II, (23 April 1998); doi: 10.1117/12.306171
Show Author Affiliations
Sheng Hsien Lin, Institute of Atomic and Molecular Sciences (Taiwan)
Railing Chang, Institute of Atomic and Molecular Sciences (Taiwan)
Kuo Kan Liang, Institute of Atomic and Molecular Sciences (Taiwan)
Jui-Hung Hsu, Institute of Atomic and Molecular Sciences (Taiwan)
Jenwei Yu, Institute of Atomic and Molecular Sciences (China)
Michitoshi Hayashi, Institute of Atomic and Molecular Sciences (China)
Wunshain S. Fann, Institute of Atomic and Molecular Sciences (Taiwan)


Published in SPIE Proceedings Vol. 3277:
Ultrafast Phenomena in Semiconductors II
Kong-Thon F. Tsen; Harold R. Fetterman, Editor(s)

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