1. Extracting the sample response function from experimental two-dimensional terahertz-infrared-visible spectra.
- Author
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Seliya, Pankaj, Bonn, Mischa, and Grechko, Maksim
- Subjects
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VIBRATIONAL spectra , *MOLECULAR probes , *LASER pulses , *TERAHERTZ spectroscopy , *METHYL groups , *DIMETHYL sulfoxide - Abstract
Terahertz molecular motions are often probed by high-frequency molecular oscillators in different types of non-linear vibrational spectroscopy. Recently developed two-dimensional terahertz-infrared-visible spectroscopy allows direct measuring of this coupling and, thus, obtaining site-specific terahertz vibrational spectrum. However, these data are affected by the intensity and phase of the employed laser pulses. In this work, we develop a method of extracting sample response—representing solely physical properties of a material—from experimental spectra. Using dimethyl sulfoxide as a model molecule to verify this method, we measure the coupling between C–H stretch vibration of its methyl groups and terahertz intramolecular twist and wagging modes. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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