Abstract

We show that the tilted-grating-assisted excitation of surface plasmon polaritons on gold coated single-mode optical fibers depends strongly on the state of polarization of the core-guided light, even in fibers with cylindrical symmetry. Rotating the linear polarization of the guided light by 90° relative to the grating tilt plane is sufficient to turn the plasmon resonances on and off with more than 17 dB of extinction ratio. By monitoring the amplitude changes of selected individual cladding mode resonances we identify what we believe to be a new refractive index measurement method that is shown to be accurate to better than 5×105.

© 2010 Optical Society of America

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References

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Albert, J.

Y. Y. Shevchenko and J. Albert, Opt. Lett. 32, 211 (2007).
[CrossRef] [PubMed]

C. F. Chan, C. Chen, A. Jafari, A. Laronche, D. J. Thomson, and J. Albert, Appl. Opt. 46, 1142 (2007).
[CrossRef] [PubMed]

Y. Y. Shevchenko, D. A. D. Blair, M. C. DeRosa, and J. Albert, in Conference on Lasers and Electro-Optics, (Optical Society of America, 2008).

Allsop, T.

Bennion, I.

Blair, D. A. D.

Y. Y. Shevchenko, D. A. D. Blair, M. C. DeRosa, and J. Albert, in Conference on Lasers and Electro-Optics, (Optical Society of America, 2008).

Chan, C. F.

Chen, C.

DeRosa, M. C.

Y. Y. Shevchenko, D. A. D. Blair, M. C. DeRosa, and J. Albert, in Conference on Lasers and Electro-Optics, (Optical Society of America, 2008).

He, Y. -J.

Homola, J.

J. Homola, Chem. Rev. 108, 462 (2008).
[CrossRef] [PubMed]

Huang, J. -F.

Huang, W. -P.

Jafari, A.

Jian, S. -S.

Kashyap, R.

Kumar, A.

Laronche, A.

Lo, Y. -L.

Lu, Y. -C.

Mapps, D.

Marin, E.

Meunier, J. -P.

Neal, R.

Nemova, G.

Rehman, S.

Shevchenko, Y. Y.

Y. Y. Shevchenko and J. Albert, Opt. Lett. 32, 211 (2007).
[CrossRef] [PubMed]

Y. Y. Shevchenko, D. A. D. Blair, M. C. DeRosa, and J. Albert, in Conference on Lasers and Electro-Optics, (Optical Society of America, 2008).

Thomson, D. J.

Tripathi, S. M.

Webb, D. J.

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Figures (3)

Fig. 1
Fig. 1

Measured transmission spectrum of a tilted FBG with a 50-nm-thick gold coating in water using two orthogonal linear states of polarization (the two spectra are offset by 15 dB for clarity).

Fig. 2
Fig. 2

Measured transmission spectra for immersion of the SPR sensor in two different media. The black bars correspond to the calculated imaginary part of the effective index for all of the cladding modes simulated for this sensor in a medium of the given refractive index.

Fig. 3
Fig. 3

Changes in the amplitude of a single cladding mode resonance adjacent to the plasmon loss peak as a function of the refractive index changes of a water-ethanol mixture. The left vertical scale corresponds to the amplitude change and the right vertical scale to the equivalent SPR shift (obtained by dividing the amplitude change by the slope of the plasmon envelope). The straight line is a best fit to the data points. The inset shows the corresponding transmission spectra of the resonance used.

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