The Origin of 1.6 Terahertz Absorption of Ice

Research output: Chapter in Book/Conference paperConference paperpeer-review

Abstract

In the terahertz spectroscopy of bimolecular solutions, freezing reduces the background absorption. For example, the absorption coefficient of room temperature water is 237-1 at 1 THz, whereas that of ice is 6.8 cm-1 at 173 K. Lower background absorption highlights any spectral features originating from the biomolecule. A reliable baseline spectrum of ice is thus crucial. Despite the interest in biomedical applications, theoretical models and experimental data related to ice are still lacking in the literature, thus hindering progress in the cryogenic measurement of biological samples. We previously reported a highly consistent absorption spectrum of ice in the 0.2 to 2 THz range, which has a profile with a noticeable change of gradient at 1.6 THz. This work extends our investigation into the origin of this feature. Specifically, we investigate whether it is due to scattering by air bubbles, or whether it is an inherent nature of the molecular structure of ice.
Original languageEnglish
Title of host publicationIRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves
PublisherIEEE, Institute of Electrical and Electronics Engineers
ISBN (Electronic)9781728194271
DOIs
Publication statusPublished - 2022
Event47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022 - Delft, Netherlands
Duration: 28 Aug 20222 Sept 2022

Publication series

NameInternational Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Volume2022-August
ISSN (Print)2162-2027
ISSN (Electronic)2162-2035

Conference

Conference47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022
Country/TerritoryNetherlands
CityDelft
Period28/08/222/09/22

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