A quantitative study of coherent vibrational dynamics probed by heterodyned transient grating spectroscopy
| Autor: | Jürgen Hauer, František Šanda, Arpa Galestian Pour, Jakob Hayden, Craig N. Lincoln, Václav Perlík |
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| Rok vydání: | 2016 |
| Předmět: |
business.industry
Phonon Chemistry 02 engineering and technology Grating 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Hot band 0104 chemical sciences symbols.namesake Optics Two-dimensional infrared spectroscopy Femtosecond Physics::Atomic and Molecular Clusters symbols Coherent anti-Stokes Raman spectroscopy Atomic physics 0210 nano-technology business Spectroscopy Raman spectroscopy |
| Zdroj: | Vibrational Spectroscopy. 85:167-174 |
| ISSN: | 0924-2031 |
| DOI: | 10.1016/j.vibspec.2016.04.018 |
| Popis: | Coherent vibrational spectroscopy in the time domain is well-established and complimentary to Raman techniques in the frequency domain. Pump probe spectroscopy as the most widespread time-resolved technique in the femtosecond regime was successfully applied to a wide range of vibrational studies, but proves challenging for highly scattering samples or for low absorption cross sections. Here we discuss heterodyned transient grating spectroscopy as a technique with superior signal to noise compared to pump-probe, while delivering identical signals. We analyze vibrational wavepacket dynamics using theory based on the response function formalism. We thus explain the distribution of vibrational amplitude along detection frequencies, relating local minima to the position of the zero phonon line and the presence of neighboring modes. Our description gives a fully coherent picture of vibrational phases and amplitudes near the zero phonon line as well as around higher lying vibronic transitions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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