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Femtosecond optical Kerr-gate measurement of fluorescence spectra of dye solutions

Journal of Luminescence
Publication Date
DOI: 10.1016/s0022-2313(99)00472-x
  • Ultrafast Spectroscopy
  • Fluorescence
  • Optical Kerr Effect


Abstract Utilizing the ultrafast electronic response of Kerr effect of glass material as an optical gate, we have constructed a system for the time-resolved fluorescence measurement in the 100-fs time region. We have demonstrated that the ultrafast Kerr-gate technique combined with multi-channel spectral detection enables us to the direct measurement of the spectral shape. Because of highly efficient gating and simultaneous acquisition of all the spectral components, the time-resolved fluorescence spectra of high S/N ratio have been obtained for several dye solutions. Although wavelength-dependent time delay of the system is found to remain, direct recognition of the dynamic Stokes shift in the S 2→S 0 fluorescence of malachite green in ethanol has been made by comparing the obtained time-resolved spectra with those of the ultrafast fluorescence of β-carotene in hexane.

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