Title :
Terahertz-wave absorption in liquids measured using the evanescent field of a waveguide
Author :
Hayashi, Shin´ichiro ; Cheng, Li ; Otani, Chiko ; Ogawa, Yuichi ; Kawase, Kodo
Author_Institution :
RIKEN, Sendai, Japan
Abstract :
A technique is presented for the measurement of the absorption properties of liquids in the terahertz wave range, based on the interaction between the liquid and the evanescent wave covering the surface of a cylindrical waveguide. The presence of a medium around the waveguide rod has a measurable effect on the overall end-to-end transmission of the waveguide. As demonstration, we report the absorption spectra of water by using several types of waveguide.
Keywords :
absorption; circular waveguides; fibre optic sensors; optical waveguides; terahertz wave spectra; water; absorption properties; absorption spectra; cylindrical waveguide; evanescent field; terahertz-wave absorption; waveguide rod; Absorption; Face detection; Liquid waveguides; Optical surface waves; Optical waveguides; Proteins; Silicon; Submillimeter wave measurements; Submillimeter wave propagation; Surface waves;
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
DOI :
10.1109/ICIMW.2009.5325754
