1 January 2006 Nanofiber optic sensor based on the excitation of surface plasmon wave near fiber tip
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J. of Biomedical Optics, 11(1), 014032 (2006). doi:10.1117/1.2165171
Abstract
We present a sensitive nano-optical fiber biosensor made by shaping a fiber to form a taper with a tip size under 100 nm. A 40-nm-thick layer of gold is coated around the tapered fiber and a surface plasmon wave is excited near the tip to achieve a sensitivity of the reflective index unit of ~4000 (% RIU–1) in the intensity measurement. A 3-D coded finite-difference time-domain approach verifies the excitation of the surface plasmon wave and the differences among its intensities in media of various refractive indices. The nanotip fiber sensor has the merits of a low background light and an ultrasmall detection region. Only a microliter of sample solution is required for detection.
Yu-Jen Chang, Yi-Chun Chen, Hui-Ling Kuo, Pei-Kuen Wei, "Nanofiber optic sensor based on the excitation of surface plasmon wave near fiber tip," Journal of Biomedical Optics 11(1), 014032 (1 January 2006). http://dx.doi.org/10.1117/1.2165171
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KEYWORDS
Gold

Refractive index

Sensors

Nanofibers

Fiber optics sensors

Surface plasmons

Water

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