Abstract
Coupling between electronic and nuclear degrees of freedom in Rhodamine 800 has been studied using fluorescence line narrowing (FLN) and three-pulse photon echo peak shift (3PEPS). From the FLN measurement we extract the Huang-Rhys S-factors and frequencies of 16 Franck-Condon active vibrations clustered in two groups centred around 350 cm(-1) and 1400 cm(-1). The five modes below 500 cm(-1) covered by the excitation pulse spectral band create a complex beating pattern in the 3PEPS measurements. After determining the reorganisation energy of the modes involved in the peak shift measurement we are able to obtain the S-factors of the modes. The S-factors from two different experiments are in good agreement. The dephasing rates of these vibrations deviate significantly from the band-gap law. We propose that the main channel for the dephasing of the modes above 225 cm(-1) is a second order process involving one phonon and a molecular vibration. (C) 2010 Elsevier B.V. All rights reserved.
Original language | English |
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Title of host publication | Vibrational Spectroscopy |
Publisher | Elsevier |
Pages | 2-5 |
Volume | 53 |
DOIs | |
Publication status | Published - 2010 |
Event | 5th International Conference on Advanced Vibrational Spectroscopy - Melbourne, Australia Duration: 2009 Jul 12 → 2009 Jul 17 |
Publication series
Name | |
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Number | 1 |
Volume | 53 |
ISSN (Print) | 0924-2031 |
Conference
Conference | 5th International Conference on Advanced Vibrational Spectroscopy |
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Country/Territory | Australia |
City | Melbourne |
Period | 2009/07/12 → 2009/07/17 |
Bibliographical note
The information about affiliations in this record was updated in December 2015.The record was previously connected to the following departments: Chemical Physics (S) (011001060)
Subject classification (UKÄ)
- Atom and Molecular Physics and Optics
Free keywords
- Vibrational relaxation
- Spectral density
- Huang-Rhys factor
- System-bath interaction
- Photon echo
- Fluorescence line narrowing