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10 October 2020 Interpretation of THz intensities of molecular crystals: the role of mixing between intermolecular and intramolecular vibrations
F. Zhang, H.-W. Wang, K. Tominaga, M. Hayashi, Masahiko Tani
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Proceedings Volume 11559, Infrared, Millimeter-Wave, and Terahertz Technologies VII; 115590A (2020) https://doi.org/10.1117/12.2575351
Event: SPIE/COS Photonics Asia, 2020, Online Only
Abstract
Through a quantitative discussion of THz modes in the racemic and enantiomeric crystals of alanine, we have examined the restriction on the THz selection rule imposed by the space-group symmetries. We have also revealed an essential role played by intramolecular vibrations in determining the IR intensities of THz modes in the low-frequency region. Although the intramolecular vibrations make marginal contributions to the vibrational energies of the low-frequency modes, they are crucial to the generation of transition moments.
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F. Zhang, H.-W. Wang, K. Tominaga, M. Hayashi, and Masahiko Tani "Interpretation of THz intensities of molecular crystals: the role of mixing between intermolecular and intramolecular vibrations", Proc. SPIE 11559, Infrared, Millimeter-Wave, and Terahertz Technologies VII, 115590A (10 October 2020); https://doi.org/10.1117/12.2575351
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KEYWORDS
Terahertz radiation
Crystals
Infrared radiation
Molecules
Polymers
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