TY - JOUR
T1 - Terahertz-wave absorption in liquids measured using the evanescent field of a silicon waveguide
AU - Cheng, Li
AU - Hayashi, Shin'Ichiro
AU - Dobroiu, Adrian
AU - Otani, Chiko
AU - Kawase, Kodo
AU - Miyazawa, Teruo
AU - Ogawa, Yuichi
N1 - Funding Information:
This work was supported in part by a Grant-in-Aid for Young Scientists (No. 17760038) from the Ministry of Education, Culture, Sports, Science, and Technology of Japan.
PY - 2008
Y1 - 2008
N2 - 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 made of high-resistivity silicon. The terahertz wave propagates inside the waveguide as the fundamental EH11 mode. The presence of a medium around the silicon rod has a measurable effect on the overall end-to-end transmission of the waveguide. As demonstration, we report the measurements of a D- glucose aqueous solution with a concentration ranging from 0% to 45%, using a backward-wave oscillator as the terahertz wave source.
AB - 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 made of high-resistivity silicon. The terahertz wave propagates inside the waveguide as the fundamental EH11 mode. The presence of a medium around the silicon rod has a measurable effect on the overall end-to-end transmission of the waveguide. As demonstration, we report the measurements of a D- glucose aqueous solution with a concentration ranging from 0% to 45%, using a backward-wave oscillator as the terahertz wave source.
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U2 - 10.1063/1.2916825
DO - 10.1063/1.2916825
M3 - Article
AN - SCOPUS:43349089700
SN - 0003-6951
VL - 92
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 18
M1 - 181104
ER -