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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 19 — Sep. 13, 2010
  • pp: 19656–19664

Phase detection properties of grating-coupled surface plasmon resonance sensors

Wen-Kai Kuo and Chih-Hao Chang  »View Author Affiliations

Optics Express, Vol. 18, Issue 19, pp. 19656-19664 (2010)

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In this paper, the phase detection properties of a grating-coupled surface plasmon resonance (GCSPR) sensor with a thin metal film on the grating structure has been studied by performing finite-difference time-domain simulation first. Both the metal film thickness and modulation height of the grating considerably affect the phase detection properties of GCSPR sensors. The manner in which the metal film thickness affects the phase curve in the grating-coupled configuration is slightly different from that in the conventional prism-coupled surface plasmon resonance (PCSPR) configuration. For experiment, an electro-optic heterodyne interferometer is used to perform phase detection of the GCSPR sensor and a refractive index resolution of 1.5 × 0−6 RIU are obtained. The results reveal that the phase detection sensitivity of the GCSPR sensor may be comparable to that of the PCSPR sensor.

© 2010 OSA

ToC Category:

Original Manuscript: June 25, 2010
Revised Manuscript: August 24, 2010
Manuscript Accepted: August 27, 2010
Published: August 31, 2010

Wen-Kai Kuo and Chih-Hao Chang, "Phase detection properties of grating-coupled surface plasmon resonance sensors," Opt. Express 18, 19656-19664 (2010)

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