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Proceedings Paper

Refractive index sensor for ultra-thin layer based on short range surface plasmon polariton hybrid coupler
Author(s): Ruiyuan Wan; Fang Liu; Yidong Huang; Boyu Fan; Shuai Hu; Jiangde Peng
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Paper Abstract

A highly integrated sensor based on the hybrid coupler, which is comprised of the short range surface plasmon polariton (SRSPP) and dielectric waveguides, is proposed for ultra-thin layer detection. The dependence of the coupling efficiency between SRSPP and dielectric waveguide mode on the refractive index change of detecting layer is analyzed theoretically. For a detecting layer thinner than 1/10 wavelength, the refractive index resolution can be high up to 5.5×10-6 RIU with large sensing range as 5×10-2 RIU and rather short sensing length as tens of microns.

Paper Details

Date Published: 25 November 2009
PDF: 6 pages
Proc. SPIE 7634, Optical Sensors and Biophotonics, 76340N (25 November 2009); doi: 10.1117/12.851979
Show Author Affiliations
Ruiyuan Wan, Tsinghua Univ. (China)
Fang Liu, Tsinghua Univ. (China)
Yidong Huang, Tsinghua Univ. (China)
Boyu Fan, Tsinghua Univ. (China)
Shuai Hu, Tsinghua Univ. (China)
Jiangde Peng, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 7634:
Optical Sensors and Biophotonics
Xingde Li; Qingming Luo; Vasilis Ntziachristos; Yoshiaki Yasuno, Editor(s)

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