Jump to main content
Jump to site search

Issue 40, 2011
Previous Article Next Article

Wavelength-modulated femtosecond stimulated raman spectroscopy—approach towards automatic data processing

Author affiliations

Abstract

A new wavelength modulator based on a custom-made chopper blade and a slit placed in the Fourier plane of a pulse shaper was used to detect explicitly the first derivative of the time-resolved femtosecond stimulated Raman spectroscopy (FSRS) signals. This approach resulted in an unprecedented reduction of the non-coherent background that results from population transfer by the Raman pump inherent to FSRS experiments. The method of Fourier peak filtering was implemented as a powerful tool for reducing both the remaining non-coherent and coherent background associated with FSRS experiments. The method was demonstrated on β-carotene and a similar synthetic aryl carotenoid. The experiments confirm earlier FSRS results on β-carotene but suggest some reinterpretation. Strong bleaching signals of ground state vibrations were observed and interpreted as an inseparable part of the time-resolved FSRS experiment. New long-lived Raman features were observed in β-carotene and the synthetic aryl carotenoid and assigned to a combination of conformational changes and solvent rearrangement. More complex wavelength modulation methods are proposed in the development of more robust FSRS experiments.

Graphical abstract: Wavelength-modulated femtosecond stimulated raman spectroscopy—approach towards automatic data processing

Back to tab navigation

Publication details

The article was received on 23 May 2011, accepted on 24 Aug 2011 and first published on 12 Sep 2011


Article type: Paper
DOI: 10.1039/C1CP21650C
Citation: Phys. Chem. Chem. Phys., 2011,13, 18123-18133
  •   Request permissions

    Wavelength-modulated femtosecond stimulated raman spectroscopy—approach towards automatic data processing

    M. Kloz, R. V. Grondelle and J. T.M. Kennis, Phys. Chem. Chem. Phys., 2011, 13, 18123
    DOI: 10.1039/C1CP21650C

Search articles by author

Spotlight

Advertisements