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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 13 — May. 1, 2006
  • pp: 3071–3076

Surface plasmon resonance sensor based on polarization interferometry and angle modulation

Zhanliang Sun, Yonghong He, and Jihua Guo  »View Author Affiliations

Applied Optics, Vol. 45, Issue 13, pp. 3071-3076 (2006)

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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 × 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.

© 2006 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(170.4090) Medical optics and biotechnology : Modulation techniques
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:

Original Manuscript: June 20, 2005
Revised Manuscript: September 25, 2005
Manuscript Accepted: October 10, 2005

Virtual Issues
Vol. 1, Iss. 6 Virtual Journal for Biomedical Optics

Zhanliang Sun, Yonghong He, and Jihua Guo, "Surface plasmon resonance sensor based on polarization interferometry and angle modulation," Appl. Opt. 45, 3071-3076 (2006)

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