Refractive index sensor for ultra-thin layer based on short range surface plasmon polariton hybrid coupler

Ruiyuan Wan; Fang Liu; Yidong Huang; Boyu Fan; Shuai Hu; Jiangde Peng

doi:10.1117/12.851979

25 November 2009 Refractive index sensor for ultra-thin layer based on short range surface plasmon polariton hybrid coupler

Ruiyuan Wan, Fang Liu, Yidong Huang, Boyu Fan, Shuai Hu, Jiangde Peng

Author Affiliations +

Proceedings Volume 7634, Optical Sensors and Biophotonics; 76340N (2009) https://doi.org/10.1117/12.851979
Event: Asia Communications and Photonics, 2009, Shanghai, Shanghai , China

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.

Citation Download Citation

Ruiyuan Wan, Fang Liu, Yidong Huang, Boyu Fan, Shuai Hu, and Jiangde Peng "Refractive index sensor for ultra-thin layer based on short range surface plasmon polariton hybrid coupler", Proc. SPIE 7634, Optical Sensors and Biophotonics, 76340N (25 November 2009); https://doi.org/10.1117/12.851979

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