A terahertz plastic wire based evanescent field sensor for high sensitivity liquid detection

Borwen You, Tze An Liu, Jin Long Peng, Ci Ling Pan, Ja Yu Lu

研究成果: Article同行評審

10 引文 斯高帕斯(Scopus)

摘要

A highly sensitive detection method based on the evanescent wave of a terahertz subwavelength plastic wire was demonstrated for liquid sensing. Terahertz power spreading outside the wire core makes the waveguide dispersion sensitive to the cladding index variation, resulting in a considerable deviation of waveguide dispersion. Two liquids with transparent appearances, water and alcohol, are easily distinguished based on the waveguide dispersion, which is consistent with theoretical predictions. A melamine alcohol solution with various concentrations is identified successfully, and the detection limit is up to 20ppm, i.e. equivalent to the index variation on the order of 0.01.

原文English
頁(從 - 到)20675-20683
頁數9
期刊Optics Express
17
發行號23
DOIs
出版狀態Published - 2009

All Science Journal Classification (ASJC) codes

  • 原子與分子物理與光學

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