Terahertz spectrum of ellagic acid

Author

Wu, Meng ; Zhao, Guozhong ; Zhang, Cunlin

Author_Institution

Dept. of Phys., Capital Normal Univ., Beijing, China

fYear

2009

fDate

21-25 Sept. 2009

Firstpage

1

Lastpage

2

Abstract

The absorption and refractive index of ellagic acid in the range of 0.2-2.4 THz have been measured by THz-TDS. It is found that the ellagic acid has the fingerprint absorption in this frequency region. The vibration absorption spectrum of the single molecule of ellagic acid between 0.2 and 2.4 THz is simulated based on the Density Functional Theory (DFT). THz absorption at low frequencies is attributed to the vibration absorption of water of crystallization. The results presented in this paper will be helpful for the inspection of medicine and food.

Keywords

molecular biophysics; organic compounds; terahertz spectroscopy; terahertz wave spectra; vibrational states; density functional theory; ellagic acid terahertz absorption spectrum; ellagic acid terahertz refractive index; frequency 0.2 GHz to 2.4 GHz; terahertz time domain spectroscopy; vibration absorption spectrum; water of crystallization vibration absorption; Absorption; Biomedical optical imaging; Chemical technology; Frequency; Optical refraction; Optical surface waves; Refractive index; Submillimeter wave technology; Surface emitting lasers; Ultrafast optics;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on

Conference_Location

Busan

Print_ISBN

978-1-4244-5416-7

Electronic_ISBN

978-1-4244-5417-4

Type

conf

DOI

10.1109/ICIMW.2009.5324678

Filename

5324678