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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 16 — Aug. 11, 2014
  • pp: 19794–19802

Application of strong transverse magneto-optical Kerr effect on high sensitive surface plasmon grating sensors

Kuei-Hsu Chou, En-Ping Lin, Te-Chang Chen, Chih-Huang Lai, Liang-Wei Wang, Ko-Wei Chang, Gwo-Bin Lee, and Ming-Chang M. Lee  »View Author Affiliations

Optics Express, Vol. 22, Issue 16, pp. 19794-19802 (2014)

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A high sensitive sensor is demonstrated by exploiting strong transverse magneto-optical Kerr effect on a ferromagnetic surface plasmon grating. The surface plasmon grating, made of a hybridized Au/Fe/Au layer, exhibits a very dispersive Kerr parameter variation near the surface plasmon polariton (SPP) wavelength via coherent scattering of the SPP on the grating structure. Interrogating this Kerr parameter can be utilized for detecting chemical or biological objects in a fluid medium. The experiment results show the minimal detectable mass concentration of sodium chloride in a saline solution is 4.27 × 10-3 %, corresponding to a refractive index change of 7.60 × 10−6 RIU. For an avidin-biotin interaction experiment, the sensitivity of avidin detection in PBS solution is 1.97 nM, which is limited by the index fluctuation of flowing media during measurement.

© 2014 Optical Society of America

OCIS Codes
(040.0040) Detectors : Detectors
(190.3270) Nonlinear optics : Kerr effect
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:

Original Manuscript: June 4, 2014
Revised Manuscript: July 23, 2014
Manuscript Accepted: July 25, 2014
Published: August 8, 2014

Kuei-Hsu Chou, En-Ping Lin, Te-Chang Chen, Chih-Huang Lai, Liang-Wei Wang, Ko-Wei Chang, Gwo-Bin Lee, and Ming-Chang M. Lee, "Application of strong transverse magneto-optical Kerr effect on high sensitive surface plasmon grating sensors," Opt. Express 22, 19794-19802 (2014)

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