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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 17 — Aug. 26, 2013
  • pp: 20268–20273

Common-path spectral interferometry with temporal carrier for highly sensitive surface plasmon resonance sensing

Siu Pang Ng, Fong Chuen Loo, Shu Yuen Wu, Siu Kai Kong, Chi Man Lawrence Wu, and Ho Pui Ho  »View Author Affiliations

Optics Express, Vol. 21, Issue 17, pp. 20268-20273 (2013)

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Incorporating the temporal carrier technique with common-path spectral interferometry, we have successfully demonstrated an advanced surface plasmon resonance (SPR) biosensing system which achieves refractive index resolution (RIR) up to 2 × 10−8 refractive index unit (RIU) over a wide dynamic range of 3 × 10−2 RIU. While this is accomplished by optimizing the SPR differential phase sensing conditions with just a layer of gold, we managed to address the spectral phase discontinuity with a novel spectral-temporal phase measurement scheme. As the new optical setup supersedes its Michelson counterpart in term of simplicity, we believe that it is a significant contribution for practical SPR sensing applications.

© 2013 OSA

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:

Original Manuscript: April 29, 2013
Revised Manuscript: June 7, 2013
Manuscript Accepted: June 14, 2013
Published: August 22, 2013

Siu Pang Ng, Fong Chuen Loo, Shu Yuen Wu, Siu Kai Kong, Chi Man Lawrence Wu, and Ho Pui Ho, "Common-path spectral interferometry with temporal carrier for highly sensitive surface plasmon resonance sensing," Opt. Express 21, 20268-20273 (2013)

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