Comparison of the THz absorption feature in lactose to related saccharides

Jon E. Bjarnason, Elliott R. Brown, Timothy Michael Korter

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

Solid-state organic compounds such as α-lactose-monohydrate and biotin have been shown to have narrow and intense THz absorption features at room temperature. Interest in lineshapes in the THz region is justified not only for practical reasons, since they are of crucial importance to spectroscopy-based identification of materials, but also because of the information the line-widths contain about the solid-state physics of the materials. The line-width of THz absorption features (generally from lattice vibrations) in solids is excepted to be inversely proportional to the scattering time of optical phonons. The line-width of absorption features might thus have implications on the solid-state physics of the material, in particular, the interaction of phonons and the phonon density of states. We use a continuous wave THz photomixing system to obtain a high resolution spectrum of a-lactose-mohohydrate and analyze two of its lowest-frequency absorption lines. For comparison we measure the transmission spectra of 5 chemically related saccharides: melecitose, trehalose, maltose, cellobiose, and raffinose. Since α-lactose-monohydrate has a stronger and narrower absorption feature than any of its related saccharides, this comparison study is an important step in understanding the mechanism of THz radiation absorption by organic solids and what line-widths to expect in THz spectroscopy.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6549
DOIs
StatePublished - 2007
EventTerahertz for Military and Security Applications V - Orlando, FL, United States
Duration: Apr 9 2007Apr 10 2007

Other

OtherTerahertz for Military and Security Applications V
CountryUnited States
CityOrlando, FL
Period4/9/074/10/07

Fingerprint

lactose
carbohydrates
Linewidth
Solid state physics
Phonons
solid state physics
Spectroscopy
Maltose
phonons
Lattice vibrations
radiation absorption
organic solids
Organic compounds
biotin
lattice vibrations
organic compounds
spectroscopy
continuous radiation
Scattering
Radiation

Keywords

  • Cellobiose
  • Lactose
  • Linewidth
  • Maltose
  • Melecitose
  • Raffinose
  • Spectroscopy
  • Trehalose

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Bjarnason, J. E., Brown, E. R., & Korter, T. M. (2007). Comparison of the THz absorption feature in lactose to related saccharides. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6549). [65490L] https://doi.org/10.1117/12.725169

Comparison of the THz absorption feature in lactose to related saccharides. / Bjarnason, Jon E.; Brown, Elliott R.; Korter, Timothy Michael.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6549 2007. 65490L.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Bjarnason, JE, Brown, ER & Korter, TM 2007, Comparison of the THz absorption feature in lactose to related saccharides. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 6549, 65490L, Terahertz for Military and Security Applications V, Orlando, FL, United States, 4/9/07. https://doi.org/10.1117/12.725169
Bjarnason JE, Brown ER, Korter TM. Comparison of the THz absorption feature in lactose to related saccharides. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6549. 2007. 65490L https://doi.org/10.1117/12.725169
Bjarnason, Jon E. ; Brown, Elliott R. ; Korter, Timothy Michael. / Comparison of the THz absorption feature in lactose to related saccharides. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6549 2007.
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