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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 14 — May. 10, 2013
  • pp: 3253–3259

Surface plasmon resonance sensor based on spectral interferometry: numerical analysis

Yunfang Zhang, Hui Li, Jingyuan Duan, Ancun Shi, and Yuliang Liu  »View Author Affiliations

Applied Optics, Vol. 52, Issue 14, pp. 3253-3259 (2013)

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In this paper, we introduce a numerical simulation of a phase detecting surface plasmon resonance (SPR) scheme based on spectral interference. Based on the simulation, we propose a method to optimize various aspects of SPR sensors, which enables better performance in both measurement range (MR) and sensitivity. In the simulation, four parameters including the spectrum of the broadband light source, incident angle, Au film thickness, and refractive index of the prism coupler are analyzed. The results show that it is a good solution for better performance to use a warm white broadband (625–800 nm) light source, a divergence angle of the collimated incident light less than 0.02°, and an optimized 48 nm thick Au film when a visible broadband light source is used. If a near-IR light source is used, however, the Au film thickness should be somewhat thinner according the specific spectrum. In addition, a wider MR could be obtained if a prism coupler with higher refractive index is used. With all the parameters appropriately set, the SPR MR could be extended to 0.55 refractive index units while keeping the sensitivity at a level of 108.

© 2013 Optical Society of America

OCIS Codes
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Remote Sensing and Sensors

Original Manuscript: February 22, 2013
Revised Manuscript: April 1, 2013
Manuscript Accepted: April 1, 2013
Published: May 6, 2013

Yunfang Zhang, Hui Li, Jingyuan Duan, Ancun Shi, and Yuliang Liu, "Surface plasmon resonance sensor based on spectral interferometry: numerical analysis," Appl. Opt. 52, 3253-3259 (2013)

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