Terahertz-wave absorption in liquids measured using the evanescent field of a silicon waveguide

Li Cheng, Shin'Ichiro Hayashi, Adrian Dobroiu, Chiko Otani, Kodo Kawase, Teruo Miyazawa, Yuichi Ogawa

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

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 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.

Original languageEnglish
Article number181104
JournalApplied Physics Letters
Volume92
Issue number18
DOIs
Publication statusPublished - 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Terahertz-wave absorption in liquids measured using the evanescent field of a silicon waveguide'. Together they form a unique fingerprint.

Cite this