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    National Tsing Hua University Institutional Repository > 理學院 > 物理系 > 期刊論文 >  A terahertz plastic wire based evanescent field sensor for high sensitivity liquid detection


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/82253


    Title: A terahertz plastic wire based evanescent field sensor for high sensitivity liquid detection
    Authors: Borwen You;Tze-An Liu;Jin-Long Peng;Ci-Ling Pan;Ja-Yu Lu
    教師: 潘犀靈
    Date: 2009
    Publisher: Optical Society of America
    Relation: Opt. Express, Vol. 17, No. 23, pp. 20675-20683, Nov. 9, 2009
    Keywords: TECHNOLOGY
    NANOWIRES
    FIBERS
    SILICA
    WATER
    Abstract: 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.
    URI: http://www.osa.org/
    http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/82253
    Appears in Collections:[物理系] 期刊論文

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