Direct and indirect dephasing of vibrational modes in a liquid

S. F. Fischer; A. Laubereau

doi:10.1016/0009-2614(78)85165-3

Direct and indirect dephasing of vibrational modes in a liquid

S. F. Fischer, A. Laubereau

Research output: Contribution to journal › Article › peer-review

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Abstract

A model for (indirect) dephasing of a high-frequency vibrational mode caused by intramolecular anharmonic coupling to a low-frequency vibration is proposed which is an extension of the exchange model of Anderson and Kubo. It contains apart of the frequency shift of the combination band and the lifetime T^*₁ of the low-frequency mode, the dephasing of the high, the low, and the combination band. T^*₁ is determined by resonance energy transfer and population decay processes. Theoretical estimates are compared with experimental data on a CH₃ stretching mode of CH₃CCl₃.

Original language	English
Pages (from-to)	189-196
Number of pages	8
Journal	Chemical Physics Letters
Volume	55
Issue number	1
DOIs	https://doi.org/10.1016/0009-2614(78)85165-3
State	Published - 1 Apr 1978

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abstract = "A model for (indirect) dephasing of a high-frequency vibrational mode caused by intramolecular anharmonic coupling to a low-frequency vibration is proposed which is an extension of the exchange model of Anderson and Kubo. It contains apart of the frequency shift of the combination band and the lifetime T*1 of the low-frequency mode, the dephasing of the high, the low, and the combination band. T*1 is determined by resonance energy transfer and population decay processes. Theoretical estimates are compared with experimental data on a CH3 stretching mode of CH3CCl3.",

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AB - A model for (indirect) dephasing of a high-frequency vibrational mode caused by intramolecular anharmonic coupling to a low-frequency vibration is proposed which is an extension of the exchange model of Anderson and Kubo. It contains apart of the frequency shift of the combination band and the lifetime T*1 of the low-frequency mode, the dephasing of the high, the low, and the combination band. T*1 is determined by resonance energy transfer and population decay processes. Theoretical estimates are compared with experimental data on a CH3 stretching mode of CH3CCl3.

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Direct and indirect dephasing of vibrational modes in a liquid

Abstract

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