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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 8, Iss. 6 — Jun. 27, 2013

Wavelength-multiplexing phase-sensitive surface plasmon imaging sensor

Yonghong Shao, Yan Li, Dayong Gu, Kai Zhang, Junle Qu, Jianan He, Xuejin Li, Shu-Yuen Wu, Ho-Pui Ho, Michael G. Somekh, and Hanben Niu  »View Author Affiliations

Optics Letters, Vol. 38, Issue 9, pp. 1370-1372 (2013)

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A wavelength-multiplexing phase-sensitive surface plasmon resonance (SPR) imaging sensor offering wide dynamic detection range and microarray capability is reported. Phase detection is accomplished by performing self-interference between the s- and p- polarizations within the signal beam. A liquid crystal tunable filter is used to sequentially select the SPR excitation wavelength from a white light source. This wavelength-multiplexing approach enables fast detection of the sensor’s SPR phase response over a wide range of wavelengths, thereby covering literally any regions of interest within the SPR dip and thus maintaining the highest sensitivity point at all times. The phase-sensitive approach is particularly important for imaging SPR sensing applications because of its less stringent requirements for intensity signal-to-noise ratio, which also means the possibility of using uncooled modest resolution analog-to-digital conversion imaging devices. Experimental results demonstrate a resolution of 2.7×107RIU with a dynamic range of 0.0138 RIU.

© 2013 Optical Society of America

OCIS Codes
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(120.5410) Instrumentation, measurement, and metrology : Polarimetry
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(170.4580) Medical optics and biotechnology : Optical diagnostics for medicine
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

Original Manuscript: February 6, 2013
Revised Manuscript: March 23, 2013
Manuscript Accepted: March 23, 2013
Published: April 18, 2013

Virtual Issues
Vol. 8, Iss. 6 Virtual Journal for Biomedical Optics

Yonghong Shao, Yan Li, Dayong Gu, Kai Zhang, Junle Qu, Jianan He, Xuejin Li, Shu-Yuen Wu, Ho-Pui Ho, Michael G. Somekh, and Hanben Niu, "Wavelength-multiplexing phase-sensitive surface plasmon imaging sensor," Opt. Lett. 38, 1370-1372 (2013)

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