Optical pump-terahertz spectroscopy of condensed phase reaction dynamics

Bret N. Flanders; Norbert F. Scherer

doi:10.1117/12.306116

24 April 1998 Optical pump-terahertz spectroscopy of condensed phase reaction dynamics

Bret N. Flanders, Norbert F. Scherer

Proceedings Volume 3273, Laser Techniques for Condensed-Phase and Biological Systems; (1998) https://doi.org/10.1117/12.306116
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

Abstract

The general theoretical and experimental principles of optical pump-THz probe spectroscopy of chemical reactions in liquids is presented. Background on specific difficulties encountered in the experimental observation is reviewed. Chiefly, signal-to-noise ratios currently limit the quality of information that can be extracted from optical pump-THz prove data on chemical reactions. This issue is shown to be connected to the assumption of linear responses. The problem of interpretation of frequency dependent absorption coefficient data of neat liquids and solutions is addressed, and reasonably successful methods for analysis of the data are presented. Transient absorption coefficient spectra of GaAs illustrates the type of information this spectroscopic method can extract form condensed phase samples.

Citation Download Citation

Bret N. Flanders and Norbert F. Scherer "Optical pump-terahertz spectroscopy of condensed phase reaction dynamics", Proc. SPIE 3273, Laser Techniques for Condensed-Phase and Biological Systems, (24 April 1998); https://doi.org/10.1117/12.306116

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