Femtosecond high-sensitivity, chirp-free transient absorption spectroscopy using kilohertz lasers

Victor I Klimov, Duncan W. McBranch

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A simple method is demonstrated for high-sensitivity, chirp-free measurements of femtosecond (fs) transient absorption over the entire bandwidth of a white-light continuum probe. This technique uses phase-sensitive detection, with spectral scanning and simultaneous adjustment of the time delay between pump and probe pulses; it permits a direct measurement of spectra undistorted by chirp at all time scales, limited only by the resolution of the fs source. The method is applied to study the ultrafast relaxation dynamics of π-conjugated oligomers and semiconductor nanocrystals.

Original languageEnglish
Pages (from-to)277-279
Number of pages3
JournalOptics Letters
Issue number4
Publication statusPublished - Feb 15 1998


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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