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Applied Physics B

, Volume 31, Issue 4, pp 235–247 | Cite as

A discussion of the problem of determining multiple lifetimes from picosecond absorption recovery data as encountered in two carbocyanine dyes

  • V. Sundström
  • T. Gillbro
Contributed Papers

Abstract

Absorption recovery kinetics data on the picosecond time-scale of a high signalto-noise ratio can be obtained by using continuously operating synchronously modelocked dye lasers. We show that such data make it possible to determine multiple exponential decays with small differences in rate constants. We also show that an absolute prerequisite to accomplish this is that the measurements are performed at a number of different wavelengths, and that the decays are monitored in a time interval corresponding to several lifetimes. These considerations are demonstrated by measurements on two carbocyanine dyes, DQOCI and pinacyanol, respectively.

PACS

42.60 42.65 61.60 

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Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • V. Sundström
    • 1
  • T. Gillbro
    • 1
  1. 1.Division of Physical ChemistryUniversity of UmeåUmeåSweden

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