Nanofiber optic sensor based on the excitation of surface plasmon wave near fiber tip

Journal of Biomedical Optics
Yu-Jen ChangPei-Kuen Wei

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 approximately 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.

References

Mar 12, 2004·Annual Review of Physical Chemistry·W Knoll

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Citations

Dec 9, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Yinni YuD Keith Roper
Apr 11, 2015·New Biotechnology·Iulia ArghirJeroen Lammertyn
Jan 27, 2015·Analytical and Bioanalytical Chemistry·Christophe CaucheteurJacques Albert
Aug 19, 2007·Optics Letters·M ChaigneauG Louarn
Apr 7, 2010·Optics Letters·Yi-Hsin Tai, Pei-Kuen Wei
Nov 14, 2019·Sensors·Thomas Allsop, Ron Neal
Feb 22, 2012·Optics Letters·Shin Ae KimSang Beom Jun
Mar 18, 2011·Biomedical Optics Express·Yongbin LinRobert G Lindquist

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