Application of liquid sensor based on surface plasma wave excitation to distinguish methyl alcohol from ethyl alcohol

Yi-Chang Cheng; WenKuan Su; JiannHorng Liou

doi:10.1117/1.602366

1 January 2000 Application of liquid sensor based on surface plasma wave excitation to distinguish methyl alcohol from ethyl alcohol

Yi-Chang Cheng, WenKuan Su, JiannHorng Liou

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Optical Engineering, Vol. 39, Issue 1, (January 2000). https://doi.org/10.1117/1.602366

A liquid sensor based on surface plasma wave (SPW) excitation was fabricated by the deposition of an optimized thickness of gold metal film on a prism. This sensor was applied to measure the reflectivity versus resonant angle of the SPW excitation using water, methyl alcohol, and ethyl alcohol of various concentrations as dielectric. An attempt was also made to theoretically estimate the position of the dip, and the result is in good agreement with experiment. The measured positions of dips, which correspond to the resonant angle of the SPW mode, varied with the species of dielectric, making it easy to distinguish methyl alcohol from ethyl alcohol.

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Yi-Chang Cheng, WenKuan Su, and JiannHorng Liou "Application of liquid sensor based on surface plasma wave excitation to distinguish methyl alcohol from ethyl alcohol," Optical Engineering 39(1), (1 January 2000). https://doi.org/10.1117/1.602366

Published: 1 January 2000

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