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Fourier Transform Techniques for Measuring Absorption of Transient Species Inoptical Limiting Materials

  • Yanong Han (a1), Wendi Sonnenberg (a1), Kurt W. Short (a1), Amy Hyfield (a1) and Lee H. Spangler (a1)...

Abstract

We have developed methods of measuring absorption of transient species utilizing both rapid scan and stepped-scan Fourier transform interferometery that allows a combination of broad spectral coverage (10,000 – 15,000 cm-1 per spectrum), good spectral resolution, and the ability to cover temporal ranges from minutes to nanoseconds. A wide range of pump sources are used including continuous, modulated, ns pulsed, and ultrafast lasers. The probe is provided by a broadband, incoherent source providing large spectral information in each experiment. This capability enables investigation of phenomena such as excited state absorption, charge transfer, formation of metastable species, and others. Extension of the technique to the ps realm is underway and will be discussed.

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Fourier Transform Techniques for Measuring Absorption of Transient Species Inoptical Limiting Materials

  • Yanong Han (a1), Wendi Sonnenberg (a1), Kurt W. Short (a1), Amy Hyfield (a1) and Lee H. Spangler (a1)...

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