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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 5 — May. 5, 2009

Determination of effective complex refractive index of a turbid liquid with surface plasmon resonance phase detection

Zhang Yingying, Lai Jiancheng, Yin Cheng, and Li Zhenhua  »View Author Affiliations

Applied Optics, Vol. 48, Issue 7, pp. 1262-1267 (2009)

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The dependence of the surface plasmon resonance (SPR) phase difference curve on the complex refractive index of a sample in Kretschmann configuration is discussed comprehensively, based on which a new method is proposed to measure the complex refractive index of turbid liquid. A corresponding experiment setup was constructed to measure the SPR phase difference curve, and the complex refractive index of turbid liquid was determined. By using the setup, the complex refractive indices of Intralipid solutions with concentrations of 5%, 10%, 15%, and 20% are obtained to be 1.3377 + 0.0005 i , 1.3427 + 0.0028 i , 1.3476 + 0.0034 i , and 1.3496 + 0.0038 i , respectively. Furthermore, the error analysis indicates that the root-mean-square errors of both the real and the imaginary parts of the measured complex refractive index are less than 5 × 10 5 .

© 2009 Optical Society of America

OCIS Codes
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(170.7050) Medical optics and biotechnology : Turbid media
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: August 21, 2008
Revised Manuscript: January 15, 2009
Manuscript Accepted: January 20, 2009
Published: February 23, 2009

Virtual Issues
Vol. 4, Iss. 5 Virtual Journal for Biomedical Optics

Zhang Yingying, Lai Jiancheng, Yin Cheng, and Li Zhenhua, "Determination of effective complex refractive index of a turbid liquid with surface plasmon resonance phase detection," Appl. Opt. 48, 1262-1267 (2009)

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