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Experimental and Theoretical Study of Strong Low-Terahertz Absorption of Thymine

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The absorption coefficient of a nucleobase-thymine-in powder form was measured with terahertz spectroscopy in both frequency- and time-domain experiments. For frequencies below 3 THz, a strong signature was observed at… Click to show full abstract

The absorption coefficient of a nucleobase-thymine-in powder form was measured with terahertz spectroscopy in both frequency- and time-domain experiments. For frequencies below 3 THz, a strong signature was observed at 1.27 THz. Furthermore, molecular-dynamic simulations were conducted to reveal that the 1.27 THz absorption signature is related to a transverse optical phonon mode. The simulations also indicated that bound water molecules are vital to the vibrational mode.

Keywords: absorption; theoretical study; experimental theoretical; study strong; terahertz; thymine

Journal Title: Journal of Infrared, Millimeter, and Terahertz Waves
Year Published: 2017

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