Time-resolved and phase-resolved vibrational spectroscopy by use of step-scan FTIR

Richard Alan Palmer

doi:10.1117/12.166800

31 January 1994 Time-resolved and phase-resolved vibrational spectroscopy by use of step-scan FTIR

Richard Alan Palmer

Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166800
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

Abstract

Step-scan FT-IR is one of the most versatile and conceptually simple means of applying the power of interferometry to the study of time dependent phenomena. The fundamental advantage of the step-scan method is the separation of the spectral multiplexing from the time domain by collecting the data while the retardation is held constant. This permits impulse- response (time domain, or time-resolved) studies with temporal resolution limited only by the signal strength, detector rise time and speed of the electronics, as well as modulation- demodulation (frequency domain, or phase-resolved) studies at essentially any modulation frequency or by use of multiple simultaneous modulation frequencies, unhindered by the Fourier frequencies of the continuous-scan FT-IR method. In this paper a review of the approaches to the step-scan method is coupled with a report of recent results in the areas of photoacoustic spectral depth profiling and in time-resolved and phase-resolved investigation of the millisecond-to-nanosecond dynamics of liquid crystal and polymer films, as well as of transition metal complexes and heme proteins.

Citation Download Citation

Richard Alan Palmer "Time-resolved and phase-resolved vibrational spectroscopy by use of step-scan FTIR", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166800

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