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Applied light-side coupling with optimized spiral-patterned zinc oxide nanorod coatings for multiple optical channel alcohol vapor sensing
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2016 (English)In: Journal of Nanophotonics, ISSN 1934-2608, Vol. 10, no 3, 036009Article in journal (Refereed) Published
Abstract [en]

The width of spiral-patterned zinc oxide (ZnO) nanorod coatings on plastic optical fiber (POF) was optimized theoretically for light-side coupling and found to be 5 mm. Structured ZnO nanorods were grown on large core POFs for the purpose of alcohol vapor sensing. The aim of the spiral patterns was to enhance signal transmission by reduction of the effective ZnO growth area, thereby minimizing light leakage due to backscattering. The sensing mechanism utilized changes in the output signal due to adsorption of methanol, ethanol, and isopropanol vapors. Three spectral bands consisting of red (620 to 750 nm), green (495 to 570 nm), and blue (450 to 495 nm) were applied in measurements. The range of relative intensity modulation (RIM) was determined to be for concentrations between 25 to 300 ppm. Methanol presented the strongest response compared to ethanol and isopropanol in all three spectral channels. With regard to alcohol detection RIM by spectral band, the green channel demonstrated the highest RIM values followed by the blue and red channels, respectively.

Place, publisher, year, edition, pages
SPIE - International Society for Optical Engineering, 2016. Vol. 10, no 3, 036009
Keyword [en]
light-side coupling, nanorods, optical fiber, spiral pattern, visible-light wavelength, zinc oxide, Coatings, Ethanol, Light, Methanol, Optical fibers, Plastic coatings, Plastic optical fibers, Zinc, Zinc coatings, Iso-propanol vapors, Plastic optical fiber (POF), Relative intensity, Side coupling, Signal transmission, Visible-light wavelengths, Zinc oxide nanorods, Optical fiber coupling
National Category
Atom and Molecular Physics and Optics
URN: urn:nbn:se:kth:diva-197188DOI: 10.1117/1.JNP.10.036009ScopusID: 2-s2.0-84982253598OAI: diva2:1055528

QC 20161212

Available from: 2016-12-12 Created: 2016-11-30 Last updated: 2016-12-12Bibliographically approved

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Dutta, Joydeep
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Functional Materials, FNM
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