Electronic photon echo spectroscopy and vibrations

Niklas Christensson, B. Dietzek, Arkady Yartsev, Tönu Pullerits

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

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 languageEnglish
Title of host publicationVibrational Spectroscopy
PublisherElsevier
Pages2-5
Volume53
DOIs
Publication statusPublished - 2010
Event5th International Conference on Advanced Vibrational Spectroscopy - Melbourne, Australia
Duration: 2009 Jul 122009 Jul 17

Publication series

Name
Number1
Volume53
ISSN (Print)0924-2031

Conference

Conference5th International Conference on Advanced Vibrational Spectroscopy
Country/TerritoryAustralia
CityMelbourne
Period2009/07/122009/07/17

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

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