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Progress In Electromagnetics Research
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A GRATING-BASED PLASMON BIOSENSOR WITH HIGH RESOLUTION

By Z. Luo, T. Suyama, X. Xu, and Y. Okuno

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Abstract:
We present an idea of grating-based plasmon biosensor utilizing phase detection to realize high resolution in finding a refractive index of a material put on the surface of a metal grating. Considering a trade-off between high resolution and experimental practicability, we show a table of recommended setup that covers a wide range of the index. Keeping the diffraction efficiency no less than 10-3 and assuming the resolution in phase detection to be 2.5x10-2 degrees, we estimate the resolution of the biosensor as 7.5x10-7 refractive index units. We also discuss the possible improvement to realize a predicted superior limit of resolution around 10-8.

Citation:
Z. Luo, T. Suyama, X. Xu, and Y. Okuno, "A Grating-Based Plasmon Biosensor with High Resolution," Progress In Electromagnetics Research, Vol. 118, 527-539, 2011.
doi:10.2528/PIER11060103
http://www.jpier.org/PIER/pier.php?paper=11060103

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