The time-resolved optical Kerr effect was used to probe the ultrafast relaxation of four halogenated methanes, CHC&, CBrCl,, CHBr, and CFBr3. A 65 fs coherent laser pulse from a synchronously pumped antiresonant ring dye laser with Fourier components ranging over 300 cm-' is separated into a pump an
Femtosecond Raman-induced Kerr effect. Temporal evolution of the vibrational normal modes in halogenated methanes
โ Scribed by Dale Mcmorrow; William T. Lotshaw; Geraldine A. Kenney-Wallace
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 568 KB
- Volume
- 145
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
We report a direct observation ofthe temporal evolution of coherently excited intramolecular normal-mode vibrations in chloroform and carbon tetrachioride using a time-resolved analog of optically heterodyned Raman-induced Kerr effect spectroscopy (OHD RIKES). The observed tetraherz oscillations are well described in terms of independently evolving harmonic oscillators driven through a stimulated Raman process involving the different Fourier components of the 75 fs laser pulse. * These results were presented at the International Quantum Electronics Conference (IQEC), Baltimore, MD, USA (April 29, 1987).
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