Theoretical studies of coherent phonon generation in dense media

Sheng Hsien Lin; Railing Chang; Kuo Kan Liang; Jui-Hung Hsu; Jenwei Yu; Michitoshi Hayashi; Wunshain S. Fann

doi:10.1117/12.306171

23 April 1998 Theoretical studies of coherent phonon generation in dense media

Sheng Hsien Lin, Railing Chang, Kuo Kan Liang, Jui-Hung Hsu, Jenwei Yu, Michitoshi Hayashi, Wunshain S. Fann

Proceedings Volume 3277, Ultrafast Phenomena in Semiconductors II; (1998) https://doi.org/10.1117/12.306171
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

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

Citation Download Citation

Sheng Hsien Lin, Railing Chang, Kuo Kan Liang, Jui-Hung Hsu, Jenwei Yu, Michitoshi Hayashi, and Wunshain S. Fann "Theoretical studies of coherent phonon generation in dense media", Proc. SPIE 3277, Ultrafast Phenomena in Semiconductors II, (23 April 1998); https://doi.org/10.1117/12.306171

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