Surface plasmon resonance sensor based on polarization interferometry and angle modulation

Applied Optics
Zhanliang SunJihua Guo

Abstract

A surface plasmon resonance (SPR) sensing technique based on polarization interferometry and angle modulation is presented. Its sensitivity is not a direct function of variation of reflection intensity, nor of phase shift. Rather, it is a function of the complex reflection coefficient. A three times standard deviation detection limit of 5.1 x 10(-7) refractive index units in a 2 Hz bandwidth is obtained with our experimental setup. A theoretical analysis shows that this technique can provide a wide linear measurement range. Moreover, the sensitivity is insensitive to the thickness of gold films over approximately 5 nm. This SPR sensing technique is suitable for physical, chemical, and biological research.

References

Jan 12, 1999·Biosensors & Bioelectronics·A V KabashinP I Nikitin
May 12, 2004·Journal of Molecular Recognition : JMR·Robert Karlsson
Jun 29, 2004·Analytical and Bioanalytical Chemistry·David J Monk, David R Walt
Feb 15, 2008·Applied Optics·S ShenJ Guo

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Citations

Jan 26, 2011·Optics Express·Xi WangAndré Knoesen
Feb 13, 2015·Nanoscale·Lauren M OttoNathan C Lindquist
Oct 22, 2008·Applied Optics·Le LiuJihua Guo

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